I've ported the Less Wrong Wiki into an Anki deck. I hope this will be useful for new members as an alternative way to get acquainted with many interesting LessWrong concepts (Newcomb's problem? Superexponential conceptspace?).
A disclaimer: this an automatized scrape and therefore it might not always look great. In particular lot's of cards don't really conform the "simple and specific" rules for spaced repetition cards (see e.g. http://www.supermemo.com/articles/20rules.htm) - the deck it is thus not meant for memorizing the definitions, but rather for reading/browsing/recognizing the concepts. Nonetheless, I hope this still will be useful for some of us (certainly for me).
I did a semi-automatic sanitization of the cards, but if you find some bogus ones (or any other problem) please let me know and I'll fix it.
The scraped Wiki version is from 01/09/2012 and there are currently 628 cards. There are "forward" format cards (name front, description back) and also "reverse" cards (in cloze format where it was possible, i.e. where the concept name comes up in the description text).
The deck is here:
The link also contains a .txt version of the cards (tab separated) which might be used to import to other repetition software than Anki.
The deck can be supplemented e.g. by the "List of Cognitive Biases and Fallacies" and "42 Logical Fallacies" decks as well as other decks mentioned on the spaced repetition wiki page.