Right now I'm watching a 2GB file in 720p format playing on VLC Player in Ubuntu 9.04 and it's playing without no shudder or anything. CPU usage is about 60% and I have it running at 1.6GHz. This is wonderful, if I tried playing this in Windows I'd get a world of problems. So if anyone wants to watch a HD movie in Ubuntu 9.04. I say go for it!