I wish more moms would express this concern, and not just to each other, but to legislators and manufacturers, as well. Here's just one quote about this health hazard:
"Polybrominated diphenyl ethers (PBDE's), also known as brominated flame retardants, have been added to many common products found in the home. Plastics and textiles are usually treated with PBDE's before being made into carpeting, furniture, casings for electronic equipment, circuit boards and clothing. PBDE retardants have been in use since the 1970's when their counterpart, PCB's, were BANNED from production due to their undeniable negative effects on human health. PBDE's are very similar to PCB's in many ways, particularly in the damage they do to our thyroid function, immune system, brain development and in our growing cancer rates." http://www.aircleaners.com/toxic.phtml
That paragraph is drawn from a site that sells air cleaners, but the toxicity is well documented, and new research keeps appearing in science journals. As a senior citizen with rather severe chemical sensitivities (the result of a lifetime of "small" exposures), I keep everything that I bring into my home as simple and non-toxic as possible.
I have had retardant-free mattresses for over 20 years, and bought one for my grandboy's crib when he was born. They are expensive, and you have to get a doctor to prescribe them, but these chemicals and others are ubiquitous. Considering how much time humans spend sleeping (and what a severe impact sensitivities can have even on our ability to sleep well), that seems an especially worthwhile area to make every attempt to keep exposures down.
(Anyone interested in a retardant-free mattress might check out Mulligan Mattress in Portland < http://www.mulliganmattress.com/ > for well-priced, super-comfy natural latex mattresses. They'll last a minimum of 20 years and are in theory biodegradable, so don't have to become part of the overloaded waste stream.)
I'm so glad you care, and have put this question out in the public eye.