The folks over at All Par have an interesting article on the 1959-1961 Jeep lineup.
Willys Truck
Jeep History On We Be Jeepin
The folks over at We Be Jeepin have put together a great article about the history of the Jeep. (link / web site no longer active) With pages about military, civilian, wagons and pickups, they cover everything. It is definatly worth the read.