thought I'd start a thread, as it seems likely to be interesting stuff popping up in an ongoing matter. On the newest iTunes v 4.8, there's more support for videos. They have a bunch of full-length videos available to watch in decent resolution, and I watched a U2 song, and stumbled acrooss Styx (a band I don't even like) doing "I Am The Walrus."
http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewVideo?b=a&videoId=35186267wild stuff!