I'm the author of the AppleTV plug-in "A Series of Tubes". A simple example of accessing YouTube media from the AppleTV. The plug-ins wikipage is here.
Hi. I've been doing Mac OS X / Cocoa development since 2001, Mac development since 1984, and Apple ][ development since 1978. Also been doing Unix development since 1988.
I've been working away in my free time on a youtube AppleTV plug-in and now have it working. After it completes its private beta test, I intend to release it to awkwardtv.com.
Drop me a line in my my talk page if you want to introduce yourself or ask questions.