I've just finished looking at the MobileMe presentation on the Apple website and I'll have to admit...I'm very, very impressed. Of course, this is always the way with Apple's presentations, but the experience looked very slick.
The only issue I have at present is using a me.com address. I have spent an awfully long time trying to convince people to use my chewedpencil.net account and have almost ceased checking my old hotmail and gmail accounts. I have moved my messaging addresses over to my chewedpencil.net address too. The thoughts of losing that identity pains me.
I'll have to sort the iPhone out first ;) Roll on 11th July.