It's really a skeptics' wiki. And just as there's absolutely no cluefulness bar to being an atheist, there's not much cluefulness bar to being a skeptic. The name skepticwiki.org was already taken when it started. (Though they've since given up and redirected their site to RW! I've suggested the RationalWiki Foundation buy the name from them - we've already taken on evowiki.org, for example.)
I am not sure whether this has been posted here before but I came across this: http://rationalwiki.org/wiki/LessWrong
What do you think about RationalWiki in general, and their opinion regarding LW?