Yep, PocketLinux was nice, but I still like being able to turn off the unit from time to time without a serial terminal with me all the time. Linux on the iPaq has a ways to go before it can replace WinCE as a useable PDA and Pocket PC OS.
(I tried every distribution of Linux I could find except the one made by the QT folks. It seemed the more adnavced the GUI was, the worse it was for supporting basic PDA features like sleep mode. And discussion at handhelds.org right now indicates the existing power managment they have comes nowhere close to WinCE on the device.)