I went to the Sprint store today to find out which phone I could buy without switching away from my awesome SERO plan... The Palm Pre was ruled out because it required upgrading to an Everything pack from Sprint. I also found out that if I upgraded to a Blackberry, I'd have to add on some sort of Blackberry data plan, so that quickly ruled out a Blackberry.
I knew I wanted to get a SmartPhone/PDA type with a full QWERTY keyboard. That left a couple HTC models and the Palm 755, Centro and Pro. The guy at the Sprint store said that the HTC models freeze up frequently, so I ruled those out. The Palm 755 was too close to my 650 and the Centro was fine. The Palm Pro had different features because it had a major difference from my Treo 650: it runs on the Windows OS.
Long story short - I bought the Palm Pro mainly because it had OneNote Mobile and it can sync up with Outlook 2007, which my Treo 650 could not do. I love having my calendar with me at ALL times. It's SO awesome!! Now that I've been using it for the evening, I have to say I'm also very pleased with how easy it was to set it up so that it pulls down my Yahoo and Gmail emails! The camera is decent, a 2 megapixels one, but no flash.
Overall, so far, I'm pretty happy with it. The new OS will just take some adjustment. I'm really bummed I had to give up on the Palm Pre, but oh well. Maybe in a couple years... I have 30 days to return it in case I decide I don't want it or like it. I'll try to post another update to see if I'm still liking it in a couple weeks.