Currently Being ModeratedApr 17, 2012 2:35 PM (in response to Atomic Latte)
Perhaps something in this support article will help:
Currently Being ModeratedApr 17, 2012 4:27 PM (in response to varjak paw)
Thank you. I rebooted everything. That has fixed the problem for now!
Currently Being ModeratedApr 26, 2012 8:46 PM (in response to Atomic Latte)
On the Mac, wi-fy sync requires Bonjour. Bonjour requires IPv6. IPv6 MUST be enabled in the Network panel of System Preferences.
For me, just doing this solved the wi-fi sync problem. When I made that change, my iPad and iPhone both appeared immediately in iTunes.