One of my engineering highlights was Russ reviewing a few of my contributions to Golang (to the core http library). He's a super cool and nice guy. I don't really write that much Go anymore, but it was a fun & cute language when it first came out.
I once wrote him an email asking what font was used in the plan9 papers. He replied. It's Lucida Sans Unicode. He even provided a url to paper published by the maker of the font.