I finished creating the 2012 edition of the Best of Rationality Quotes collection. (Here is last year's.)

Best of Rationality Quotes 2012 (500kB page, 434 quotes)
and Best of Rationality Quotes 2009-2012 (1200kB page, 1140 quotes)

The page was built by a short script (source code here) from all the LW Rationality Quotes threads so far. (We had such a thread each month since April 2009.) The script collects all comments with karma score 10 or more, and sorts them by score. Replies are not collected, only top-level comments.

As is now usual, I provide various statistics and top-lists based on the data. (Source code for these is also at the above link, see the README.) I added these as comments to the post:

Top quote contributors by total karma score collected
Top quote contributors by karma score collected in 2012
Top quote contributors by statistical significance level (See this comment for a description of this metric.)
Top original authors by number of quotes
Top original authors by total karma score collected