I was able to get Prey working as detailed here:
http://talk.maemo.org/showthread.php?p=1271984

Somehow I missed this thread when I installed Prey originally. I was not able to get the webcam working, as I couldn't find a package for Maemo that contains `streamer`. Marcus claims he got it working on the wiki page. Would anyone happen to have a copy of his modifed version of Prey that I could look at?