What is a mac user group? How can I find out if there is one in my area?
Also what is Apple Care?
Sorry, I've not been able to check back 'til now.
A Mac User Group is a basically a club of people who own Macs. The act as self-help group, bring speakers in to talk about Mac stuff, etc etc. The one thing you know about a MUG is that they all own Macs. Ask around the computer stores, or check their bulletin boards. They should be good source of advice.
"Apple Care" is the official extended warranty that Apple sells on new equipment. IIRC it runs 3 years (someone feel free to jump in here if I'm wrong). If you buy an iBook its possible it may still have some time left on the warranty. The price of the iBook will likely be higher in this case.
"Unofficial" Apple Care simply means that the MUG usually exists to help each other out. So if you are a member, or buy from a member, you should be able to get some help - or at least advice - should any problems develop.
Good Luck....