They just got my S2 back today. LOL The S2 really was nice but the OS home screen doesn't update like .328 on my S1. And as I mentioned to Bryan, it didn't have that "new phone" feeling. More of a "fixed phone" feeling. I think there are going to be a lot of things I'll miss.
AutoText, Custom Dictionary and I don't know if URLs or phone numbers in text/e-mails can be clicked with a proper action taken. The OS supports cut & paste (so I've read) but that doesn't mean all the apps do.
I'm just interested in learning a new gadget and know (have a strong feeling) that being open source will make the Droid quite exciting!