I found UML Distilled to be an excellent beginners resource. Any books others can recommend?
In the area of CASE tools, I found Together to be a decent tool. I started using it simply because the version of Visio I had sucked for doing UML (I didn't use any of the real CASE stuff -- I just used it for making the models). The new visio for XP seems to be much better, however. What's your favorite UML tool?