Very cool. I'd love to work with you to bring interesting apps to it.

Also, not sure if you have put much effort into trying to synch YouTube very accurately (down to the 20th of a second or better), but if that is interesting or important to you, I've done a good bit of work with dealing with the inaccuracies of YouTube's timer via the API and I'd be glad to share my code as well as ideas for this. I've found I can get it very accurate by using a bit of smoothing combined with looking at the system time. (I haven't yet done cross-internet synching and dealing with latency, but I have a plan for it)