there oughta be a law...

The Law Librarian's Society of Washington DC has created a website called the LLSDC's Legislative Source Book, with a page all for laws related to federal agency operations. The interface is a little too simple, and kind of suggests that you should know what you're looking at before you look at it. Still, if you're wanting lots of information all in one place, this is as good as it gets. Examples of laws and bills featured: the E-Government Act of 2002, the Sunshine Act of 1976, and the Freedom of Information Act.