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I think it's doable, depending on what you want it to do. Considering you example of the Casio Data Bank 150, about the only thing that needs Internet access would be the scheduler for keeping your calendar in-sync. Personally, I'd drop the phone directory because I have that on my phone. Calculator, stop watch, alarm, etc. are all doable without the Internet.

If the watch is something you glance at ("Whoops! Time for my 2:00 meeting!") or use momentarily ("What is 17% of $7392?"), I don't think there'll be a problem with battery life. But if the theory is that my smart watch will replace my smart phone, I don't think so.

no no... i mean touch screen ONLY phones. Even sony recognized the importance of a keypad on this one.

The iphone boils down to being a great touch screen OS for phones. I expect the iPhone2 to be more like this:
http://www.casio.co.jp/release/2006/images/w41ca/t heme_S.jpg
(opens and folds)

I have this phone for when I go back to Japan. It is not a touch screen (don't need it to be), but if it had the iPhone interface as a UI mode, that would be a true advancement. But if I had to turn in the keypad to get it, forget it.

I am still disappointed at how WOWed people get by features that have been standard in most other markets for years. Like wireless broadband. Which in japan is faster than most DSL and cable connections in the states.

I just finished my university degree in physics (I also had a brief unsucessful engineer degree debut) and no graphing calculators are allowed in exam rooms. The McGill science faculty, engineer faculty, and the Polytechnique de Montreal only allow certain calculators at exams. If you plan on seriously investing in a calculator don't spend more than 25$. I have a Casio fx-991MS (on all the faculty's white-list) and I love it; it did everything I ever needed a calculator to do. For anything more complex I used maple or wrote a C program, and rarely did I ever need to graph something on a calculator (I got pretty good at approximating curves by hand). I won't deny that TI makes a nice graphing calculator (the TI-89 is quite impressive), but in all honesty graphing calculators are just toys. Link to user's guide: http://ftp.casio.co.jp/pub/world_manual/edu/en/fx1 15MS_991MS_E.pdf Link to Amazon product page: http://www.amazon.com/Scientific-2-Line-Display-Ca lculator-fx-991MS/dp/B000KIFUVG (actually 35$, but my school bookstore sold it cheaper at 20$)

The W21CA has a 2.6 inch widescreen...
http://www.casio.co.jp/k-tai/w21ca/

Don't forget the Casio Claspad. I have one, and its pretty nice. I just prefer a real keyboard.

This Page compares the TI-89 with the HP49G+. I don't own the HP, but it looks like the winner.

Casio's Cassiopeia FIVA 2xx series (Page in Japanese only) has both Win and Linux installed by default, and it allows you to switch the boot block with external switch... It weighs just above 2lbs, supports 800x600, does have PC card slot, USB, LAN, 1394/FireWire port, CF slot and VGA port (with converter cable). The Crusoe 500/600MHz, 128MB RAM (upgradable to 384MB on most models) and the video interface with only 2MB VRAM can be a pain, but it is a decent combo they pulled.

Unfortunately its production has been halted, and in addition, the series were hardly distributed in US market. Of course, since this still contains some flavor of Win, I guess it still does not qualify for the original poster :-P

The Casio G-Shock Palm is what you're looking for...unfortunately they don't make one. But wouldn't it be cool? The toughness of a G-Shock watch, with the simplicity and versitility of the Palm OS. Color screen would be nice too. Heck, let's even have another proprietary expansion slot of some kind too(water resistant of course). Seems if Handspring & Sony could license the Palm OS, Casio should be able to too. I mean heck, aren't G-Shocks like the most collected thing in Japan.

Yeah, I know Casio has the Casiopeia, and some others. And the industrial handhelds (but like the man says, too pricy for what you get.) But they all run some WindowsPickYourSuffix.

You can run linux on at least one of 'em, I think, but still not G-Shock.

Casio has made a G-Shock(ish) cell phone, but it's ony available in Japan so far.

Imagine the Dolphin/Whale conference G-Shock Palm.

The unit is loaded with diverse I/O standards, including compatibility with a 100Base-TX LAN, iEEE1394, USB, a CompactFlash (CF) Type II card slot, a PC Type II card slot and a v.90/K56 Flex high-speed modem....

Palm/Pocket PC - Capabilities & Reality. Rebuttal from a CasioE100 Owner:

a) Don't compare processors... the Palm does everything quickly and efficiently with 16mhz. The Pocket PCs are 133mhz+....never intended to be an MP3 player.

I have run 'tests' with a coworker who runs a PalmIII/V, we did blanket searches on a 'word' contained in our PIM databases. I retrieved my data faster on every attempt, regardless of 'type'. My device has 16 megs (8RAM/8ROM) with about 5-6MB of PIM data. Admittedly NOT scientific, but it was enough to convince the both of us.

b) Palm Multi-platform friendly. The Pocket PC is all about Windows...iPaq can run linux, and Slashdot runs stories about it regularly).

I have CF Ethernet. To send files back/forth I simply use FTP/SMTP. The Pocket PC does not sync with any Non-Windows PC PIM Software (that I am aware of). I can move files to the CasioE100 without any trouble from _ANY_ TCP/IP capable box.

c) The Pocket PC has painfully little application support. VNC? SSH? Telnet?....generally more expensive than Palm.

VNC
Telnet
SSH

There is plenty of software available. More than I can even try.

d) No wireless support yet for Pocket PC...To me at least, there's no point getting a media rich Palm device if I can't use it to access the net.
CF Modem that I use togetherwith my phone

e) Cost, Cost, Cost. You can get Palms for as little as $149 ... NEW. Lower costs mean more accessibility to the geeks that write the code. :)

You might have me on this one.

CasioE100: $600
CF Modem: $69 (MS Rebate deal)
CF Ethernet: $180
2 x 96MB CFRAM: $300 ea.
Nokia Cell Phone: $200 (or so)
Having the most technically capable, multimedia, wireless, portable Palm/Pocket (whatever) PC/PIM: Priceless.

NOTE: I bought the device based on what it _CAN_ do by leveraging the OUTSTANDING hardware in a Palm/Pocket PC (at its time 10mos.) ago. I am not a great lover of M$, but their still is no comparing this device to _ANY_ Palm product. Please be realistic and leave the Anti-M$ zealotry out of your analysis.

I submitted this to /. a while ago but...

Here's a watch from Casio that can play 32MB of MP3s. Not too practical, but pretty neat.

They also have a watch that is a digital camera.
See it here.