My Treo 650 arrived yesterday and I spent way too many hours last night completely loading it up with all the applications I wanted to use on it. I have read of many instability and reset issues and was a bit worried about what might happen, but I put 34 3rd party applications (including Chatter email, VeriChat, Docs to Go 7, Uninstall Manager, WordPop!, Farkle, Busker, Pocket Tunes, Blackjack, MyBible, Mobipocket, and more) and so far haven’t had one issue. I launched each application and put in my registration codes and played with them for a couple minutes and still never had an issue of resetting. I really think the devices that are sold by the carriers may have issues due to the things that they add onto the devices. I have read the GSM unlocked models seem to have less problems.