The most current information on CCD, most of it being posted by Jerry Bromenshenk,
can be found here:http://listserv.albany.edu:8080/archives/bee-l.html
Please remember that everything said to date has been preliminary and
speculative. Bottom line, the work is not done, and there have been
many things that looked like clues, but turned out to be dead ends
and red herrings, which slowed down the work.
I fear that when spring comes, and bees start flying, the actual
losses will be found to be much more widespread and depressing
than many currently think.