I've already gone Linux myself.
Do all your software programs run on Linux?
Funny how we all hesitated when XP first hit the shelves, but eventually, we were forced to upgrade. As XP has been revised, it's become a lot more manageable. I don't think it's out of the question to assume that Vista will achieve the same status at some point. I waited until that last possible second to upgrade to XP/SP2. It was a seamless transition. I may repeat the same scenario for Vista if improvements are made. If not, a Mac is the only other option for me. I've never been much of a Mac person myself, but I'll give one a good look if MS doesn't get it together.