Hi.
edit: I suspect LW has fewer lurkers than average. Speaking as a lurker, the conversations here are not easy to follow (this is more the structure rather than content, but sometimes the content gets pretty esoteric). I've limited my participation to reading top level posts of interest, and the comments if the article is sufficiently fresh.
Some research says that lurkers make up over 90% of online groups. I suspect that Less Wrong has an even higher percentage of lurkers than other online communities.
Please post a comment in this thread saying "Hi." You can say more if you want, but just posting "Hi" is good for a guaranteed free point of karma.
Also see the introduction thread.