Paula just added an interesting post here:
Our toxic environments have a lot to do with why we got myeloma. (see http://www.sciencedaily.com/releases/2009/08/090813142148.htm)
From the maps linked in Paula’s blog, you can see that the industrialized countries have more MM in their populations.
There’s some information to be found on myeloma cancer clusters by googling:
I’ve been really lazy about posting these days. There’s a lot going on.