With all of the cap talk today it's a good time to mention a couple of important sources of information.
For cap clarification (at least as clear as it can be made) I head first to Larry Coon's Salary Cap FAQ Site.
For salary info I like to look up our old friend Storyteller here. He has all the numbers you'd want, color-coded for easy reference.
P.S. These are both permalinked in the sidebar now for your convenience.