I know I read somewhere that there are occiasional resets by itself. I have found this to happen only when connected to the hotsync cable. I usually leave it attached while at my desk, and it will do a soft reset by itself
I guess the trick is to remove the cable after a hotsync.

Secondly, there is apparently a magnet in the back underwhat I assume is the speaker - WATCH OUT - it picks up paper clips, and even worse, staples