I have been having trouble on using youtube on my XV6800. It works but there is massive lag.

Did you try the new beta version 0.8? Supposedly lag times are improved, but I didn't see any improvement at all on my Q when streaming internet radio.

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My brain is so full of S (Entropy, that is), I don't know anything anymore.

I just downloaded the one released to me on 9/21/08, is that the one. I have seen some improvement over the last few days than when I first launched it. That could have been that there were alot of programs running in the background though.