Welcome! If you want to post a more formal introduction, you can use the regular Welcome thread.
I don't know if you caught the conversation about introductory posts a while back, but if you want some easy jumping-in points besides just going through the series, I posted a bunch of links and a couple others were suggested.
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.