Myself, I got to bed early and I'm fresh as a daisy. Unfortunately there's really nothing I have to see this afternoon, so I'm likely going to do one more go-round of the expo floor looking for free pens, then I'll be on my way back to D/FW.
I went to a google-sponsored seminar on interfacing with YouTube. Seems like a fairly easy thing to do, although save for a few people like the Spore group, not many are taking enough advantage of it. Myself, I'm always up for someone who's willing to donate a big pile of bandwidth to me for free, so I'll have to figure out some way to leverage it. Suffice it to say, YouTube is more than happy to donate a big pile of video bandwidth to you for your game project, so figure out a way to leverage it.
There are also API's to interface with the comment and rating system. Not sure how useful that is given that 98% of YouTube comments seem to be written by people missing a chromosome or two. To me, that'd be like having free and ready access to everything ever written by David Icke -- an interesting concept, but ultimately just a big pile of stupid.
We'll see. Coverage gets posted RSN, so you can hook yourself to the YouTube developer community and make that judgement yourself.