Hi I'm purchasing a new Computer and will be using Ubuntu instead of Windows this time. I would use windows 7 but it doesn't support my software and i dont wanna use XP anymore. So I'm getting Ubuntu 10.04 which supports my software. Is there any tips or tricks that are good to know? or anything else i should know about Ubuntu? and is there an Alt-F4 trick in Ubuntu that brings up like a Task Manager or something? Thanks a lot!