Pretty amazing, but why is Safari 4 so much slower than Chrome? Aren't they both based on WebKit?

Mike, Chrome has its own JavaScript engine.

Safari 4 is running it at about 11fps

Thanks for that, I've just spent the last 20 min playing Tetris! (level 9, 30074 points)

Oh and obviously posting a bunch of NES ROMs on a website is TOTALY legal (not that I'm complaining, just think Nintendo might have something to say)

Thats great. This are one of the reasons why chrome is unique among different browsers.