Hi! Been lurking for a while, at least occasionally.
Had to create a new account to post, and had some trouble--it seemed that it was cached badly, maybe because scripting was disabled when I first hit "register"? Clearing the cache fixed it, though.
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.