I think I worked with Theo in 1981. Smart, nasty.
The other day we were talking about the need for social skills in large projects mostly because of CK's message exchange on LKML about BFS. Theo is a very clever guy and does some truly outstanding work, but I would not like to work with him on anything important. I love what I do and I have no need to get burned.
The thing I remember the most was he had long spider-like fingers and could touch type.
I was at a company called Rainbow Software in Calgary.