I'm really excited for MobileMe. I'm not dumping Gmail for an @mac/@me.com address, but wireless/push calendar and contact syncing is hella welcome. I just hope it's more reliable than .Mac syncing, which is pretty hit or miss usefulness wise.
Seems once a week I get a .Mac sync dialog box telling me I have "42 Conflicts" that need resolved in iCal... And they're all for appointments from 2004-2005. WTF?
As for Bookmarks, I can make a change on my laptop. Sync... Then sync my iMac and the new bookmarks won't show up. If I sync a second or third time, they'll eventually be there.
Here's to hoping MobileMe has all this BS fixed.