I have been watching this thread for some weeks now, and I must say that the way Apple manages these issues leaves a lot to be desired.
First - it seems that while its happy to charge premium prices for its gear, promoting how easy their products are and so on, that it wants to completely stick its head in the sand on more serious technical issus.
Apple leaves it up to these forums for anybody to try and get any assistance (yes you can go to the Apple Store, but the geniuses don't have a clue on this issue). It seems that the process is to release a product, and then deny by omission that anything is wrong.
There are so many individuals with the same issue in this thread (and other threads also), and what progress has there been since the original post? NOTHING.
Ok - we can reset everything, stop and start services, try reinstalling things, delete and recreate settings and more - but at best it might start working for a few minutes, or perhaps a little longer. This is just not good enough Apple! Eventually I imagine it will be fixed, but with no fan-fare, with no announcements - just pretending that the issue never happened.
We are attempting to sync with iPhones and iPod Touch over Wi-Fi, with no method working consistently.
Compare with my Android Phone running Double Twist - sync's over Wi-Fi without any problems.
I agree with one of the earlier posters - this and other issues that I have had (eg sim card's not working after IOS upgrades because of the restrictive carrier policies) I have decided enough is enough.
Sorry Apple, but you will not be getting any more of my money. I am sick of being told how great my apple devices are and not having any recourse or ability to resolve when things go wrong. There has been plenty of suggestions on this forum - surely enough for Apple to realise that this is an issue?
Time to go check out the latest Nexus 4, and MS Surface - Anything but Apple! Telling all my friends the same!