super3:
Greg Sanders and myself (Dave Harding) wrote almost all of the original text. The in-text illustrations were all done by me, I think. Saïvann Carignan (blockgenesis) was managing editor, integrated the text into the website (along with icon development), and generally did the many small necessary things to keep the project on track and productive. I'd call us three the current core docs team (but more people are welcome!).
Mike Hearn brought most of us together, provided a large number of invaluable early reviews, and more ongoing feedback to the degree his busy schedule allowed. Knowing we had the explicit support of at least one core dev was highly motivating, and I think we're all deeply appreciative that Mike was willing to lend his time to our endeavor.
Tom Geller provided line-level editing of the first-written section of the guide, the Block Chain section, as well as creating the style guide we continue to follow.
Chris Beams has been continually providing reviews, feedback, testing, and suggestions both on the text and the website presentation.
Quite a few other people have contributed, although in ways that are harder to track. For example, Greg and myself used the Bitcoin Wiki extensively for research, and the authors of those articles deserve a huge thanks. We're also incredibly grateful to everyone who reviewed parts of our text for accuracy---even if they didn't find any mistakes.
I hope I haven't forgotten anyone.
As for Bitcoin addresses, Saïvann (blockgenesis) received some docs thank-you donations and has already made arrangements to split them between himself, Greg, and myself once they stop coming in. He's been receiving those donations to the address in his sig, 18XXXQs1vAQGBAZbXKA322r9Zy1nZac2H4. If you send a tip because of the docs, you really should mention it to him that it was for the docs.
However, speaking only for myself, I think the best contributions we can receive are additional reviews for accuracy and help spreading the word about these docs.