Erm, just done a Google search on Leslie Lamport and his e-mail address is

[address removed at Mr. Lamport's request] http://lamport.org, better forget my suggestion... :rolleyes: :rolleyes: :rolleyes:

I wouldn't mind Leslie Lamport being interviewed. Just because he works for Microsoft Research now doesn't mean that he's a bad guy or anything. He has done a lot of great work in the world of computing...

Here's the Wikipedia page on LaTeX: http://en.wikipedia.org/wiki/LaTeX

It is open source (LPPL license). So technically he is a creator of open-source (though not GPL) software.