Another locus classicus of the swamping problem is Jonathan Kvanvig's The Value of Knowledge and The Pursuit of Understanding (2003) (here it is on amazon). Kvanvig does much better: he sets the whole thing up as an attempt to deal with the problem I raised (i.e. the swamping problem). Man, I really should have been paying attention! But then by the time you get to Pritchard and Turri's Stanford Encyclopedia article, I've dropped out of the bibliographies. I'll have a look at some of Kvanvig's earlier papers.
When I finally get back up to speed, I'll make this sucker stick against virtue epistemology and all the other alleged answers. K=TB, baby.
One way this happened, I think, was that everyone agreed that my position was ridiculous (and like I say many of the eminences of epistemology gathered at at APA in '92 or '93 and tried to crush it). One problem was that if I was right, the whole of analytic epistemology after Gettier was kind of a waste of time; I thought my position was a fun and useful provocation, but I can see how people might not want that, and the book was never published (originally I submitted it to the same Cambridge series that eventually did Kvanvig).
But then again, my argument did present one fundamental challenge: the 'swamping problem' or 'the problem of the value of knowledge.' For one thing, it just destroyed reliabilism. So people managed to absorb that, then maybe thought they'd be discredited by association with my insane conclusion? Everyone who tried to answer the problem or build on it, including Kvanvig, Jones, and Zagzebski, answered it on behalf of JTB or used it to build toward relatively fresh but not apparently bizarre conclusions (the way it drove virtue epistemology as a theory of justification). So that was a lot more palatable to everyone, and they wanted to forget where I drove it, so they wanted to forget where it came from.
Anyway, I am going to arm up (as it were) and reassert that (propositional) knowledge is merely true belief against all comers, virtuous, social, and whatnot. Then you can repress it again, so it might take another century or so, but finally people will capitulate to the obvious, no matter whom they attribute it to. One remark: the reason people have such strong 'intuitions' that knowledge requires more than truth and belief is because for a philosophy prof, whatever they said in intro when you were 18 is a baseline truth you remember from before birth. Guess what? There is no such intuition.