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.
Well said! It really is the difference between night and day, isn't it. I've owned Macs for over 10 years but am usually delighted with new software and hardware revisions (with a few noteable exceptions!).