Just a very quick suggestion: scroll down and have a look at the post that Jeff added on Heidegger and Marx last year.
Nick: sorry to hear that the HM conference was turgid in places, but it sounds like some interesting ideas were raised; we should pick up on some of the issues that you mention in the seminar. I was only able to attend the conference on Friday, and my own experience of it was pretty much positive. Pretty much everything I saw was on Adorno; none of it was bad, but one paper (delivered by a guy named Werner Bonefeld) was excellent. Maybe worth checking out