Indeed, he's a famous opensource developer and wrote some books, including "The Joy of Clojure" one of the most famous Clojure books out there.
You will get a "huh?" from the majority of developers management likes to hire as cogs.
Fogus: Say my name--
Declan: You're Heisenberg.
Fogus: -- to 1,000,000 Java programmers and--
Declan: WTF?
--
On a more serious note, the above is my way of giving props because Joy of Clojure is a really good book.