Dunno exactly. It was in Air Cargo News about 3 weeks ago - some kind of a powder. There's another DG discussion going on in Freight Dogs if you'd like to join in. 737SS is over there too.
Your right in that the DGR are becoming in general less restrictive, but therefore in some cases more complicated...
I've also come to the conclusion that the Captain's signature is for "having recieved the notoc", and not being responsible for it's correctness.
------------------
rgds Rat