I had to give up the iPhone because I got horrible AT&T reception after I moved to a new place, so I ended up on Sprint and decided on a Pre. I really like my Pre, and the notification system for emails, txts, calendar alerts, etc. is leagues ahead of the archaic pop-up and non-informative "number in the corner of the icon" system used on the iPhone. I think the multi-tasking is handy and anyone who questions why you'd need to do it as an excuse for the iPhone's lack of it is just being purposely obtuse. The conductive charging station is also handy and it will be difficult going back to any phone that doesn't have that as it's so much easier to deal with when I get home from work to just sit it on the touchstone charger than fumble with a cable. Admittedly, sitting the iPhone in the cradle isn't much a problem, but every other smartphone makes you fumble with a mini-USB port and have that cable sitting our all the time - bleh!
The keyboard I could give or take. It's not horrible, but it's not the best, but as with every keyboard I've ever used I've gotten used to it to where I can type pretty fast with it.
I was never a huge application-whore though, so I can see where the attraction is still better on the iPhone or even Android for that aspect of it. I pretty much stick to the web browser, email, memos for misc. notes, and phone functions on my smartphone though. If I'd been able to wait a bit longer I may have gone with the Hero since I'm somewhat wanting to try an Android phone - but I wonder how the notifications are handled on that platform? Is it dependent on what "skin" your phone manufacturer has used?