Reptilian shapeshifters

You don't see too many of them in Urban Fantasy, do you? I mean, not as good guys anyway. I know LKH has had weresnakes and nagas in the Anita Blake books, but I can't think of any besides that. I blame David Icke and his reptilian overlord conspiracy theories (although he may have a point about Tony Blair).

I've seen a developing trend for avian shapeshifters, and I've read a couple of books featuring weredolphins, but reptiles seem to be ignored, or relegated to bad guys. Is that because reptiles are inherently creepy? Too cold-blooded and scaly to be suitable hero material?

Well, screw you guys. I'm going to write a story with a weresnake in it! And blackjack! And hookers! No, wait, not the last two.