I am rather impressed by using Ubuntu 7.04 Feisty on a lot of my Macs. Granted it may not be as user friendly as Tiger but it runs a little bit snappier using the same specs. I even had 7.04 installed on my Tangerine iBook 300mhz and it wasn't bad at all. Granted, there are quite of apps with Mac OS X and Ubuntu. Now that Ubuntu Studio is released perhaps we have something comparable to Final Cut Express which is open source. Plus Ubuntu has very few problems with the drivers on the Macs as compared to the PCs I tried to install on (Alienware was a nightmare to deal with). Thus Macs are good for running Ubuntu, Tiger and Windows Vista! Honestly, Vista is out the door and I am preferring Ubuntu much more than the M$ software. Any other Ubuntu/Mac OS X users here?