I think I might be the only person who never degreases the chain! I only ever wipe it off a bit after a re-lube with TriFlow. When I can't stand how dirty it's become (or when my ruler shows 12 1/16") then I replace it with new.

Sheldon Brown has an interesting article about chain maintenance:
http://www.sheldonbrown.com/brandt/chain-care.html