I hard reset my express not too long ago and I can't get air tunes to function. The express worked with my iPod (jailbroken running 4.3.1) before I reset it and now it doesn't. When I play a song on it and select my express it appears that it should be working on my iPod, however it isn't. While my iPod is "playing" on my express I can connect to it with my computer and it will work while my iPod is "using" it. I have done countless resets and restarts of both my iPod and my express.