I am also interested in the spread of chytrid. My major interest is in African species, especially Xenopus sp. and whether or not the "out of Africa" hypothesis is valid. Here are a couple of sites that might be of interest:
Boloka: Chytridiomycosis, an emerging infectious disease of amphibians in South Africa / C. Weldon - big pdf file (doctoral thesis), abstract included.
AACRG