Feel free to mark this post. In 5 years time I expect the iPhone platform's dominance to match or surpass the perception of eBay's stranglehold in the auction game.
Okay, on the BBS's calendar.
I wouldn't be surprised to see a BlackBerry service running on ... iPhone handsets
I'll just point out that since the iPhone explicitly prevents developers from running apps in the background, that is currently impossible. Not saying it can't or won't change. Just pointing out the current state of affairs.