Brad DeLong has an interesting post reacting to the talk at the Valve about Theory's Empire. I haven't joined the discussion over at the Valve despite being invited, because I suspected the discussion would not be worthwhile. I've looked at some of the posts there, and don't regret my decision.
I think DeLong gives too much credit to Foucault (I've not read Tribe); for example, his "rational kernel" looks like the "close reading" of the New Critics. Nevertheless, I think DeLong's article is worth a read because in his generousity to Foucault he demonstrates what might be done if one leaves Foucault behind, or as he puts it, using Foucault's ideas as "tools" rather than as "masters."
By the way, be sure to look at that LONG footnote. He includes excerpts from some of the few bits I've seen that are worth your time to read.