(a lot) OS leopard 10.5 still, windows XP, ubunti 9.04 workstation and server; FreeBSD
----------
stalwarts: C, python, ruby, perl, awk, javascript
adopting and loving it: clojure, scala, erlang,
assessing capabilities/complexity: ocaml, F#, haskell
----------------
editors of choice: vim, komodo, Jedit, gedit
cause clojure and erlang encourage it: emacs