Hey there, I'm WP-Buddy, a WordPress developer (Flow). I create WordPress plugins and themes. Check out my website for more information or in case you want to contact me: http://wp-buddy.com
Because we are constantly working with WordPress we intend to edit the Codex if we believe it contains errors or if we think there is something missing. We believe this is a good opportunity to give something back to the community.
At the moment we're trying to contribute to the Plugin_API/Filter Reference and the Plugin_API/Action Reference