I always felt a bit bad about pushing my own name here. I can't talk for Chris of course, but I'm thinking that this is a more appropriate text:
© Copyright 2010-2012, Buster.JS contributors
(Thanks to jodal for the suggestion.)
In fact, as far as I know the latter is also more correct. Since the individual contributors haven't signed agreements to transfer the copyright of their contributions to Chris and me, the actual copyright holders of the various contributions are held by the actual people that made the contributions in the first place. This is very AFAIK, but I think that's how copyright law works in most contries.
What do you think, peeps?