Although I happily drink the Kool-Aid every few days ...
... this MobileMe launch is truly ghastly. I've been a member since the iTools days and the service always did work for me and keep my information on the web and synchronised between Macs.
After the MobileMe transition (the, ahem, three-day-transitionathon), my shiny new iPhone is pretty much in sync with my iMac, my girlfriend's G4 Mini running Tiger, the work Mac I've commandeered running Tiger, and my iPod Touch.
The cloud occasionally gets a little, ah, cloudy - I just do a wholesale replacement of info either from the cloud or from the Mac.
The only hitch I've seen is that my e-mail processed on the iPhone/iPod Touch isn't reflected in the online MobileMe webmail. All those spamity spam spams are still sitting in my inbox. A bit annoying but not a showstopper.
The MobileMe web app interface is still wonky, though - not quite slick, fast and seemless as Apple's web monkeys would have you think. The responsiveness of, say, changing folders in web mail leaves MUCH to be desired.
Still, not soooo shabby - let's just hope the bugs are worked out shortly.