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My hosting business, Binhost Technologies, uses Asterisk behind its IAX/SIP Origination and Termination and wholesale VOIP operations. It works well -- the price is right and the features are many. Most phones work if they speak SIP, IAX, or H.323 and the system comes configured from the start in a pretty usable state.

A few things we've found out: The scripting system is a bit of a learning curve. Also, the configurations are one of those Jenga configs -- breathe too hard and it falls down. You have to be really, really careful when messing with the configs because one place can easily mess up another thing. But once you get a good, working config, it just works.

Processor usage is reasonable, too. A P-266 would do well for a couple of lines and maybe up to 10. After that you'll want a bit more horse.

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I have a nice little perl app that sends an sms message upon receipt of an e-mail. Since it's written in perl it would be fairly easy to add in some sort of filtering ability.

I'm not sure what would happen if you made a copy of IE using the IEAK that contained a custom UA string that had the word "Opera 5" in it. I wonder if it'd get blocked too.

What would happen if a new worm suddenly surfaced that, amongst others, added the word "Opera" to Internet Explorers User Agent? Looking at Changing your User Agent it looks quite trivial.

Since the User Agent string has nothing to do with the functionality of a browser (it doesn't change if you disable Javascript, cookies, Java, ActiveX, Active Scripting, Flash), so to rely on it is something close to muppetish.

I'm running NetCaptor at the moment, so the User Agent changed to:
Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 4.0; NetCaptor 6.5.0RC1)
My rendering engine hasn't changed at all, I just have the ability of tabbing between multiple pages - one of the neat things about Opera and Mozilla 0.9.5

I thought we had convinced everyone of the pointlessness of using User-Agent to make decisions on. Looks like the lesson needs to be taught again.

The exact formats of different messages can be found in the document stdma_sm.pdf which you can download from the nokia smart messaging page. To actually download anything you need to give them an e-mail address and click on a disclaimer, so I can't link directly to the file. There are also a lot of other very good documents on that page.

For the purpose of providing some sort of answer to your question, the thing that you are most likely to want to do is send names and numbers from your PC to your phone. The format used is basically equivalent to vCard with ASCII armor and some extra headers. Your business card messages will start with the header segment
//SCKLwwww23F4xxyyzz
where //SCKL signals the beginning of Smart Messaging data, wwww signals the origination port (doesn't matter what you use as long as it's a 4 digit hex number and it's the same for all parts of your message), 23F4 is the port on which the vCard receiver listens, xx is a reference number which must be common to all parts of your message, yy is the total number of parts in the message and zz is the sequence number.

As an example we'll say that you want to send to your phone a number for somone named AAA whose number is 1234567890. The vCard will look like this:
BEGIN:VCARD
N:AAA
TEL:1234567890
END:VCARD
This has to be converted to ASCIIhex to be sent to the phone, to the vCard data turns into:
424547494E3A56434152440D0A4E3A4141410D0A54454C3A31 3233343536373839300D0A454E443A56434152440D0A
Now we can split this into two separate SMS messages so that it can be sent to the phone. They're going to look like this:
//SCKL23F423F4990201 424547494E3A56434152440D0A4E3A4141410D0A54454C3A31
//SCKL23F423F4990202 3233343536373839300D0A454E443A56434152440D0A
Given this information it should be pretty trivial to write an application which sends this data to your phone's e-mail address, but I have yet to see a decent one for either Windows or Linux. Maybe I'll write one later if I get to feeling bored.

In other nifty fun with SMS you might want to look at the shell script I wrote which sends the subject and from lines of incoming e-mail to your phone via a web to SMS gateway.

I'm not sure how well I've answered the poster's question, but I hope that I've added a little bit of information that someone finds interesting.

Begin shameless plug
I'm the veep of a hosting company named binHOST.com. While we've never had anyone want to run Slashcode yet, we'd be happy to work until it worked on our server. We're currently looking to relocate and will eventually have enough rackspace to have more than one machine for anyone who would be looking to colo their own box on a high-speed net. (3 - OC3s and 2-DS3s at the moment, we'll be moving to multiple OC-48s soon.)

We run RedHat 6.1 (yeah, the GOOD release) and our philosophy is customize, customize, customize. You need something you can't get at any other hosting site? Talk to us. We're here to give you the hosting you need for a price that's reasonable. We have an 800 number and encourage our clients to call and use it. We believe in the power of Linux to provide hosting and the no-nonsense approach to doing it. And that's it, folks. Check us out. If we don't have what you want, ask. Feel free to look other places if you want, we don't claim to do every single thing in the world for hosting, but we'd sure as heck like to make a try at it. :)
End shameless plug

On a more philosophical note, why don't hosting companies take time to work out special deals for their customers? We've had so many customers happy just because we did this one or the other little thing to make their hosting work uniquely. *shrug*
Check us out. binHOST.com - Network Services for the World

Begin shameless plug
I'm the veep of a hosting company named binHOST.com. While we've never had anyone want to run Slashcode yet, we'd be happy to work until it worked on our server. We're currently looking to relocate and will eventually have enough rackspace to have more than one machine for anyone who would be looking to colo their own box on a high-speed net. (3 - OC3s and 2-DS3s at the moment, we'll be moving to multiple OC-48s soon.)

We run RedHat 6.1 (yeah, the GOOD release) and our philosophy is customize, customize, customize. You need something you can't get at any other hosting site? Talk to us. We're here to give you the hosting you need for a price that's reasonable. We have an 800 number and encourage our clients to call and use it. We believe in the power of Linux to provide hosting and the no-nonsense approach to doing it. And that's it, folks. Check us out. If we don't have what you want, ask. Feel free to look other places if you want, we don't claim to do every single thing in the world for hosting, but we'd sure as heck like to make a try at it. :)
End shameless plug

On a more philosophical note, why don't hosting companies take time to work out special deals for their customers? We've had so many customers happy just because we did this one or the other little thing to make their hosting work uniquely. *shrug*
Check us out. binHOST.com - Network Services for the World

From the: It's-too-darn-cute-to-throw-away! dept.

There has been for awhile an effort to create "Computer Shelters", lists of people willing to take in and house computers that were no longer wanted by others. This is still a large effort, and I urge you if you have interest in this to sign up at one, or all of, the shelters available. It doesn't mean that you have to take any computer offered, but it does get your name and contact info out there to people looking to give computers to a better home.

Some of the shelter members use the computers themselves around the house, others clean them up and repair/upgrade them and then give them to charitable causes, relatives, etc. Apparently on the east and west coast a lot of shelters have given away compact Macs to a lot of kids who think they are the greatest! It's good to think that this older hardware is up to something good.

Here is the list of available resources that I know of dealing with Abandoned Computer Shelters, etc.:
Jessicat's JMUG Shelter List, although this is down right now, you can view the cached copy HERE
Tarsi's Abandoned Computer Shelter List
California Computer Recycling
Share the Technology
No good reason to throw them away when they're wanted! :)