Pennsylvania has House Bill 357
Short Title: An Act providing that any Federal law which attempts to register, restrict or ban a firearm or to limit the size of a magazine of a firearm in this Commonwealth shall be unenforceable in this Commonwealth; and imposing penalties.
This bill is gaining a fair amount of support even has it,s own facebook page
(you have to bee logged in to fb for this link to work) that is up to almost 8,000 likes. I sure hope these folks are doing more than just liking the fb page and write their Reps to get this passed.