If you want people to ask you stuff reply to this post with a comment to that effect.
More accurately, ask any participating LessWronger anything that is in the category of questions they indicate they would answer.
If you want to talk about this post you can reply to my comment below that says "Discussion of this post goes here.", or not.
I've been getting an increasing number of interview requests from reporters and book writers (stemming from my connection with Bitcoin). In the interest of being lazy, instead of doing more private interviews I figure I'd create an entry here and let them ask questions publicly, so I can avoid having to answer redundant questions. I'm also open to answering any other questions of LW interest here.
In preparation for this AMA, I've updated my script for retrieving and sorting all comments and posts of a given LW user, to also allow filtering by keyword or regex. So you can go to http://www.ibiblio.org/weidai/lesswrong_user.php, enter my username "Wei_Dai", then (when the page finishes loading) enter "bitcoin" in the "filter by" box to see all of my comments/posts that mention Bitcoin.
Can't claim to have put much thought into this topic, but here are my guesses of what the most cost-effective ways of throwing money at the problem of reducing existential risk might include: