I'm not sure how I feel about the video the PPA put together (Kaartkeizer's post) a while back - I think it's a bit contrived and too long - but just looking at the recent news should give every US poker player reason enough to join the PPA and get as involved as possible.
In case you haven't heard, the governor of Kentucky is currently trying to seize the domains of just about all online poker sites to effectively block every resident of KY to even access them. This is not only extremely scary for online poker, but for all sorts of free speech issues and civil rights in general. Click
here for more info about this mess.
I am personally on the board of our (still very young) state chapter, but we've already been able to make an impact and get some great awareness and recognition during the recent convention, and we're working to not only keep online poker as legal as possible in CO, but to also further poker in general and possibly get a legal exclusion for it from general gambling legislation.