Hi,
Adding my 2 cents...wifi sync fails for me as well. I'm running Win7 on a MBP 2011 using Parallels 7. All I need is to sync Outlook 2010 with the iPhone...and Apple customer support told me that is not possible. Not with wifi and using iCloud fails to sync Outlook Notes.
So, I guess there's a group of us who are are stuck with using the USB cable. Hopefully, Apply comes up with the fix soon or someone here drops the secret code.
Lawrence