Hi. I'm a lurker here, working on my PhD in Computer Science at the University of Wisconsin. I've only been reading for the last few months, but I've gone through all the major sequences in the archives.
Cool... Engineering physics grad student at UW.
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.