While I'm a long-time Crackberry man, I'm going to make my prediction:
Three platforms will matter in the future.
1) Nokia in Europe 2) Iphone in the US 3) Google-Android in the US (which I'd guess will end up killing Blackberry down to Corporate Users, then buy RIM for the email push technology, add it to Android)
I've been eyeing some of those sexy Android phones....on the verge of cracking.....likely to happen when contract is up for renewal.