By the way, the Recent Comments sidebar (at least in Discussion) is lagging 5-10 entries, maybe more. Don't know if this bug has already been mentioned.
EDIT: Oh, sorry, looks like it's just Firefox. When I opened new pages the sidebar didn't update, but it did upon refreshing.
This link
http://lesswrong.com/r/all/recentposts
gives a page which lists all the recent posts in both the Main and Discussion sections. I've posted it in the comments section before, but I decided to put it in a discussion post because it's a really handy way of accessing the site. I found it by guessing the URL.