In the unrooted 2.2 rom from HTC I moved all the apps I could to the SD card to free up space. I had widgets for Pandora and 3 Banana Notes on my home screen. After the move to SD these widgets showed up as widget not working or some other error message on the home screen. I rebooted hoping that would help but it didn't so I then trashed the broken widgets and tried to re-add them to the home screen. They were no longer in the list of available widgets. I could still open the apps from the app drawer but the widgets were nowhere to be found. I rebooted again just in case but no change. I then moved the apps back from the SD to the phone and boom, the widgets were back in the list of available widgets. So, it appears that if you move the app to the SD card the app's widget doesn't appear in the list. I guess this makes sense as if you don't have the card in you couldn't use the app so the widget wouldn't function properly. I just haven't heard about this limitation before and wondered if anyone else had experienced this. I'm aware this build may not be final so perhaps this behavior may change in future releases.