With a few small exceptions where I've prepared small, tightly focused mini-documents everything is generally done orally.
Amen! Right now myself and Damp are just shooting a ton of emails back and forth. With this particular game concept there's really no need for a design doc. There's no story at all (think Mindsweeper) so it's purely game mechanics, rewards, etc etc. Oh and eventually some polish (turtle wax?)
I have a bum right ankle and no commitments whatsoever. This might actually get finished...