[varun @ Mar 14th 2008 8:26PM]

I too have one - I got mine in September or so, and have enjoyed it since. There's a huge and active product suggestion forum over on forum.chumby.com, but some of the big requests that I have for the device:
-The touchscreen is abysmal. Not bad, nor poor, abysmal. A good third to a half of all clicks just disappear. The accelerator is also less sensitive than I'd hope for, so many of the games that depend on things like that just don't work as advertised.
-The latest firmware has made the networking stack more unstable. A solid networking stack is the key to everything else on this. More testing by the company would help.
-More control of widgets from the device itself. In the early (alpha) devices, I remember that a big part of the appeal was to be able to add and remove widgets from the device. I don't know why that functionality disappeared (or if it was perhaps misrepresented in the media - I don't know, I didn't have one), but it would be very nice to have that (or have that back).
-Easily attachable short term battery. It's a quick booting device though, which lessens the pain. But oh, my kingdom for an easy battery - I had to dig through most of the device to get a battery attached.

If you're in the market for a solid clock replacement, you definitely cannot go wrong. If you're looking for more, though, spend time getting to know the widgets before you spend your $180 on it. You may not find what you're looking for right away. But I'm not unhappy with it - I quite like it - but if I could have just one thing replaced, it would be the touchscreen with something more sensitive.