The XJ-List is a great e-mail list where you can get a lot of information.

http://www.JeepsUnlimited.com  is great Bulletin Board to learn a lot and meet other great Jeep Fans

http://www.pirate4x4.com is a great Bulletin Board for those hard core 4x4ers.
This place is not for the weak at heart.
If you take offense easily please do not go here, but rather go to JeepsUnlimited.