rabbitoid: Yep. I've been using Ubuntu for over a year now. At first I even gave myself the trouble of going configuring Opera properly to share the same profile from both Windows and Linux. But it's been months since I last booted my laptop on Windows .
I'm also one of those guys that accomplishes a lot of things through the command line, so I can find my way around problems rather easily. But, even for the basic user, the foruns of the Ubuntu community provide lots of help, sometimes.

MadMonkey: From what I've heard it seems like Windows 7 is a whole lot better than vista. This comes even from some M$ ceptics, so there could be some thuth behind those feelings.
As for Ubuntu, give it a go for at least a week or two before making your mind up. There are bound to be things you miss from Windows... There are bound to be things you'll be missing from it if you get back to Windows, back it takes some time to find out about what you don't know it's there