More generally:
Summaries of the core sequences in easier to understand language.
1) This would make it more accessible to everyday people, and would be more persuasive to them.
2) It would be easier to understand for rationalists too. And would be good for quick references.
I think it'd be a good idea to keep a list of the ways we'd like to see LessWrong improve, sorted by popularity. Ie. email alerts for new responses.
So if you have an idea for how LessWrong could be better, post it in the comments. As people up/downvote, we'll get a sense for what the consensus opinions are.
I think there's a pretty good amount to be gained by improving LessWrong.
Note: I say "ways to improve" instead of "features" because "ways to improve" is more general.