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In stock right now. They have the new one too.

You're welcome :)

About five years ago I, spent about $75 on a low power FM transmitter from CanaKit. I can get music anywhere in my house (or at close neighbors' houses) with a simple radio. CanaKit's transmitters cost from $20 up to $300 and have about a 150 meter range (about 500 feet).

Recently I added the "Remote" app to my iPhone. Now I can chose songs and playlists without needing to walk over to the computer. Obviously this will not work if you can't, or won't, use iTunes.

Any internet connected machine will control the audio programming, and any old FM-radio will do the trick of receiving the signal. Simple. Effective. _AND_ Wife-Friendly(TM) (at least, according to my wife ;)

Because of FM-modulation, this technique is not hi-fi. But a decent transmitter does an admirable job in retaining audio quality.

That's exactly what I did. I bought a low-cost/hi-quality FM transmitter from these guys and plugged it into my computer. I can listen to my music on any fm radio in the house, in the yard or, for that matter, in some of the neighbors' houses. YMMV, but it sure works well for me

Rather than buying a wi-fi client for each "music box", I bought am low-cost/hi-quality FM transmitter from these guys. I can get my music on any fm radio in the house, the yard (or, for that matter, at some of the neighbors' houses). One example: I can have a custom playlist for a dinner party on the living room stereo. A second example: I listen to tunes on a boom box while I'm working in the yard. YMMV, but it sure works well for me!

I started with a 50-in-one kit, then moved up to a 100-in-one, and finally a 200-in-one. I was in an electronics store the other day and saw a 500-in-one kit. I almost started drooling. It had an LCD display, a microprocessor, and a keyboard.

Actually, I would love to find the manual for my 50-in-one kit. I remember it talking about "biasing the transistor" and stuff like that. It was beyond me at the time. The later kits didn't explain how the circuits work.

I use this Hi-Fi FM radio transmitter to send music to the various radios in my home, or to a boom box when I'm out working in the yard. The same manufacturer also makes a nice USB powered xmitter

I use this Hi-Fi FM radio transmitter to send music to the various radios in my home, or to a boom box when I'm out working in the yard. The same manufacturer also makes a nice USB powered xmitter

Cana Kit also has a stereo version which is much cheaper than the Ramsey unit (about 40 bucks).

http://www.canakit.com/Contents/Items/UK222.asp

They also have a more expensive USB based FM transmitter which connects directly to your PC and doesn't require batteries, etc. This one is fully assembled with box and everything.

http://www.canakit.com/Contents/Items/UX300.asp

I just ordered the UX300 since I got tired of changing batteries all the time. I have been using their UK222 for a couple of years broadcastings MP3s and internet radios around the house.

Cana Kit also has a stereo version which is much cheaper than the Ramsey unit (about 40 bucks).

http://www.canakit.com/Contents/Items/UK222.asp

They also have a more expensive USB based FM transmitter which connects directly to your PC and doesn't require batteries, etc. This one is fully assembled with box and everything.

http://www.canakit.com/Contents/Items/UX300.asp

I just ordered the UX300 since I got tired of changing batteries all the time. I have been using their UK222 for a couple of years broadcastings MP3s and internet radios around the house.

100 foot (30 m) range. Works with your current stereo and any portable radio. Half the price. For example Canakit's UK333

You're just the opposite of me. I've got 9G of Vorbis audio but less than 2G of MP3s, and no WMAs.

I can't speak for others but I use Vorbis because it sounds better than MP3 for the same (or less!) bitrate. (I was planning on setting up Icecast and streaming my muisc over 802.11b so I could pick it up anywhere in the house. I got a very low-power stereo FM transmitter and hooked it up to my soundcard instead.)

Oh, and all my 9G of Vorbis files are ripped from my CD collection. All legal.

I set up an old Pentium 90 with a 14GB disk and a 16x CD-ROM. It runs RedHat 7.2, but it's not networked, so I copy files from CD-R. I plugged the sound card into one of these FM transmitters. Now I have my own private radio station.

Your suggestion on FM micro-transmitters piqued my interest. This is so cool!

Here's some that I found:
Mighty's Pirate Radio Site provides schematics or you can purchase some pricey assembled units.
This assembled kit is only $35.