I was researching this topic for you when I ran across this excellent article and decided just to give you the whole thing.  it has some stuyff that I am going to go put in practice on my other blogs right now so have a good day.
How to Get Inbound Links from Government and University [...]

I know what you are thinking Blog College… WTF! I decided what was really lacking was a bulletin board forum for bloggers. Almost any subject you could want to talk about has its own bulletin boards, usually several. However I have never heard of one for bloggers, much less been directed towards [...]