Google Uncle Sam for .GOV & .MIL sites
Google Uncle Sam is one of the tools I use when I search for information that I'm guessing is out there on a government site somewhere. And, as an experienced Web searcher, I know that the information on government sites is usually quite reliable. You certainly can't get that guarantee with just any site that the general Google search engine turns up.
There is a nice review of the features of Google Uncle Sam in the latest LLRX.com.