I just want to clarify. When the computer is awake and itunes is running it does work. Once the computer goes to sleep it is hit or miss. The way wifi sync should work is once you plug your device in ir press sync no it should send wake on lan packet and it should wake up the computer and initiate the sync. So sometimes it works and sometimes it does not. What happens is that once you press sync now or plug the device in the harddrivr in the computer start spinning (ie it sees the wake on Lan) but the sync doesn't always happen.
I posted in the apple developer bug reporter and got a reply recently asking me to do the following.
Please turn up usbmux related logging as follows:
sudo defaults write /Library/Preferences/com.apple.usbmuxd DebugLevel -int 7
Then reproduce the failing case and attach /var/log/system.log. Thanks
I am not very familiar with Sudo commands and am not all that eager to try it. I will turn on usbmuxd but will not know how to turn it off.