Thanks for bumping this.... I forgot to update it. I installed Leopard on the 20th, and it runs great. Youtube works sorta ok on 360p, 240p is much better. But since I have Mactubes, I use it instead. The only gripe I have is the fan kicks on more often than it did with Tiger. I think I will evnetually upgrade the HD to a 7200rpm drive since I am running on a 4200rpm one right now. Or even an SSD from OWC.