gentle introduction to CT?

Hello all, I'm a complete novice to Category Theory, and I'm looking for some kind of tutorial or other introductory material that would help me at least get up to speed with the basics. Maybe something that assumed some discrete math and abstract algebra, and proceeded to develop the topic for beginners. Are there any intro texts like that out there? (And if not, would someone please write and publish one? :->) Thanks, - Stephen Davies (stephen@umw.edu)