With all of the hardware released today, this one interested me the most. It's basically an iPod touch with a smaller screen, without the home key, custom apps, no accelerometer, and some other minor mishaps, but overall, I think it looks really awesome.
One feature it has to to automatically turn on to the clock so you can get a strap for it and wear it like a wristwatch. No word if it has WiFi, but that would be cool to have a little wristwatch computer.
$149 for 8GB or $179 for 16GB is the only downside.