1. Yes. I went from LW to the OB archives, I created an account to comment on an old post there.

2. I've been ignoring the Sequences as such, but have been working my way through the OB archives chronologically, which I gather covers the same material.

3. Hard to answer that question. The cognitive bias stuff is fairly old hat. The timeless-physics stuff is new to me, but isn't really a skill. I'm currently working my way through the metaethics stuff, which I'm not finding particularly convincing but haven't finished thinking about.

4. One friend, to both HPMoR and the OB archives. Not so much LW per se, which (sorry) seems to have a higher noise:signal ratio than the old stuff.

I've been paying a little bit of attention to recent posts, but not a lot; mostly I've been "time-travelling" through the archives.

I've been responding to posts here and there when I have something to say I don't see in the comments. I do this even though I don't expect anyone is reading old comments (though sometimes they get upvoted or responded to, so it's not a complete vacuum), mostly because I often don't really know what I think about something until I've tried to formulate a response to it.