I got my phone about a week and a half ago. Installed .99 almost immediately and just upgraded to .103, heres what I have found so far.
* typing seems more responsive
* IMed a picture to a friend and got the following error: Uncaught exception: Application net_rim_bb_aim(171) is not responding; process terminated
* music player no longer seems to cut off beginning of songs
* color banding seems about the same as in .99
* short lag (about 2 seconds) but almost instant unlocking
* 40.5mb free right after a batt pull
will post again after after I have been running it for a while.