Speaking of cool: Ipaq with Linux running DOOM in landscape mode seen at the embedded system show.

I tried that distro on my iPaq and found it to be one of the more advanced ones for the UI. Problem is that it had an older handhelds.org kernel, so no power managment was present. The current situation on the iPaq Linux ports is that it either has an awesome UI, but no power managment, or some power managment, but no decent UI. I figure I am going to wait about 6 or so months to let things advance before replacing WinCE on my iPaq. Because personally, I like being able to use the power button on the top (a glorified sleep button), instead of the actual power switch, thus loosing any saved changes.