The lack of background apps on the iPhone is, we can only assume, a consequence of Apple's goal to get the most battery life as they possibly can out of the thing. Presumably, they'll evolve the thing to either support it, or have enough hooks that you don't desperately need it.

I'd say it's a bit less clear how strong Android is versus how weak BlackBerry is. Certainly, BlackBerry is widely loved in the business universe, and the new stuff seems to be built from a different codebase than the old stuff.

If you said I had to bet my money on either BlackBerry or Palm for who's got the most market share in 5 years, I'd go with BlackBerry in a snap. I will give Palm credit for pulling off a hell of a demo.