I think that rabbit hole day has so far been very successful and I congratulate crisper for having the idea for it. I'm enjoying the other posts in this vein by folks on my friends list. Thanks to you all too!
If you want to read more posts by other people, a lot of people have linked to them in the tail end of the discussion in Crisper's original announcement. Also, I set up the rabbitholeday community for people to link to their posts in, although it doesn't really appear to catch on.