I have seen many Christian cartoon web sites but none of them beats www.reverendfun.com They are very creative and well focused. At the time of this writing the site has an archive of previous cartoons, which goes back to November 1997. If a cartoon is associated with a specific scripture verse the reference is indicated along for better understanding.

Visitors are permitted to illustrate these cartoons in their own work (Conditions apply, but this is free of charge and conditions are easy).

Just give it a try!