At some point we were joking at ICFP that we might as well rename it into Oleg fan club. (I think that year he had contributed either directly or indirectly to a particularly large number of papers.)

Sure, Oleg Kiselyov, the owner of that site, is a very frequent poster at Lambda the Ultimate and entries on his site are frequently discussed there.

Oleg's tarpit is awesome. Some of my best value in learning has come from going down rabbit holes there.