OK, so here is how to pair and communicate with itunes & atv over HTTP:
http://dacp.jsharkey.org/
Now we can make our own GUIs and control interfaces for itunes & atv!
The guy who provided all of the information at the link above won a google programming contest to create a cool application for the android phone. His app is an open source program that controls itunes & atv. It's just as good if not better than Apple Remote on the iPhone. AND it's open source!
Have Fun