Great choice and welcome to the community
The MacBook is an awesome product. I can't believe how hard it spanks my G4 PowerBook that cost me more than a semester at school... but lets not talk about that right now.
Check out the Help menu (from the Desktop), go to Mac Help, then Switching from Windows. Pretty much all you need to know is there.
Also, if you have any questions at all, we are happy to help you here.
Let us know what you think about your new toy