I've had the same problem intermittently, when I couldn't sync. I found in my case closing and reopening itunes did the trick.
Obviously this isn't perfect and defeats a lot of the point of wireless sync, but it did work in the end.
Also of note for multiple device owners, not seen this covered before but I was able to sync my iPad and iPhone simultaneously.
Obviously this isn't perfect and defeats a lot of the point of wireless sync, but it did work in the end.
Also of note for multiple device owners, not seen this covered before but I was able to sync my iPad and iPhone simultaneously.