categories: Cat as a model category

["Steven R. Costenoble" <matsrc@Mail1.Hofstra.edu>]

Here's a question I've already asked on the algebraic topology mailing
list. I received several very interesting replies, but there seems to be
little published and I'm curious what else is out there:

I have Thomason's 1980 paper "Cat as a closed model category." Are
there any other references for model category structures on Cat, the
category of small categories?

--Steve Costenoble
  matsrc@hofstra.edu
  Dept. of Mathematics
  Hofstra University
  Hempstead, NY 11549