The OS seems to be a love it or hate it thing. I love the way it looks in the demos, but I don't think I'll buy one. There are a few things that worry me, such as the lack of a removable microSD card, no true multi-tasking, and no copy/paste. My last 2 phones were Windows Mobile, but I recently jumped ship to Android with my HTC Evo, and I'm not going back. Microsoft had their chance, and they lost me.