A recent report about 'microwave safe' plastics and links to diabetes:
http://www.sciencenews.org/articles/20060121/fob4.asp
Here is an article describing how PVCs mimic estrogen
http://www.anapsid.org/cnd/hormones/sabotage3.html
The link between plastics and breast cancer, alluded to in the article above, more clearly spelled out here:
http://www.fwhc.org/health/xeno.htm
And, BTW, you don't have to cook with plastic to have it leach -- running water through PVC piping has been shown to give off enough PVC to cause acceleration of breast tissue growth (a leading prognisticator for breast cancer).
Check out
http://www.ourstolenfuture.org/
I'll try not to go on a rant, but breast cancer rates in women have gone from 1 in 20 in 1950 to 1 in 8 today. Yet most research money is spent on better chemotherapuetic agents and genetic factors with environmental causes getting little attention. I am not an expert, but my hunch is that women today aren't significantly genetically different than they were 50 years ago.
BTW, Zeneca, the company that funds the Think Pink breast cancer campaign makes 100's of millions of dollars in the manufacture of plastic.