Regs for mailing DNA

["Mary Colter ", BIO]

Does anyone know where I can get REAL information on mailing DNA samples? 
This includes info on things such as recombinant DNA, genomic DNA, etc. 
if it is considered hazardous (what kinds of disclaimers, etc). The local 
post office here is not  really well equipped to deal with these questions.
Also Does anyone recognize the word 'prion' or 'pryon' or something that 
sounds like this? Is this a company or a product? I have a friend who is 
looking for this information. Thanks - replies don't really need to be 
posted back to the network,  just e-mail me, please.
colter at chuma.cas.usf.edu