For more information on the worldwide Amphibian declines you can check out the articles on it at Amphibiaweb and Wikipedia. For the latest research news you can do a search on amphibian decline at Science Daily. There's a couple of interesting stories there:
Bacteria Show Promise In Fending Off Global Amphibian Killer - (May 25, 2007) — First in a petri dish and now on live salamanders, probiotic bacteria seem to repel a deadly fungus being blamed for worldwide amphibian deaths and even extinctions.
Parasites Might Spur Evolution Of Strange Amphibian Breeding Habits Parasites can decimate amphibian populations, but one researcher believes they might also play a role in spurring the evolution of new and sometimes bizarre breeding