I only worked on HALF the manual, and this part wasn’t my half, but I wanted to advise about the tremendous amount available on the FJC website (Federal Judiciary Center) and the ABA website. I just returned (June 2011) from a very informative and invigorating workshop put on jointly by these two groups and was struck with how much they provide of which I had only scratched the surface.
But here are a few good links:
(this one is worth a lot of exploration- there is much more on it than I realized until I met some of the people involved last week.)
GREAT Linda Greenhouse article on Citizens United and Buckley v Valeo