I actually like the tools that come with SQL Server 2008. The relationships viewer works great, and prints nicely for the design folder, and the browser tool gives me all I need to see about the nodes I'm viewing. Neither exports a pdf or doc file that I know of, however, so the value is limited. If I ever need to distribute my documentation, though, I plan to print it to a pdf creator program like CutePDF.
"A Journey of a Thousand Rest Stops Begins with a Single Movement"