I am playing video content but only get sound when I stream to AirPlay. The question is whether this is a limitation of the app I am using or a network issue. When I choose AirPlay the speaker icon (not TV) is visible. The app in question is ABC iView, which has just been released, but the problem seems to be general, I don't think that I has yet seen video on AirPlay.What exactly are you trying to do? There are some limitations, but it is probably not your network.
Oh, by the way, the discussion I found was on Apple's support forums.
Lots of ranting: Apple - Support - Discussions - Why the Airplay limitations? ...
Edit: And apparently a response from Steve Jobs: