http://www.aerotoxic.org/ i a good start
http://www.pprune.org/forums/showthread.php?t=272102 got lots of posts about fumes too !
Fumes mainly happen on the older 757 and the 146
The CAA have been denying there is a problem for years and i think a crash is needed before they will ever admit there is a problem.
There interest is with keeping the airlines happy as this could cost the airlines and the main plane producers lots and lots of $$$$$$$$$$$$$$$$$
there is also documented proof that BAe paid some Australian airlines money as a settlement for the fumes problem on the 146(back in the early 90s)
Neil