I don't really see any visual changes except for the ability to adjust the sound (loudness) for maps. Otherwise looks the same for release #2.
The only thing working for me that was NOT working was Sparrow, so the emails now format correctly and that is without any Sparrow updates.
Total download in install here in my iPhone about 15 minutes, so pretty good.
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Testing Reminders with iCloud Beta and it seems to sync faster back to the phone.
Also told that with Beta 3 that our .ME address will change to .iCloud, has anyone seen that or want that?