My friends and co-workers know that I'm a huge fan of Consumer's Union (and Consumer Reports). They champion all sorts of excellent causes. Their most recent success was the consumer credit card legislation which, when fully implemented, will be a boon to consumers in protecting against the most blatant abuses of the credit card companies. (I gave $20 and sent a stack of letters as part of that issue, and I'd encourage everyone to do the same for every good cause you come across.)
Here is the link to their petition to the FDA (click me) to entirely remove BPA from our food. This might even be more relevant to those of you with children, but I encourage you all to take a look, and if you agree, please sign the petition.
PS. Check that box to stay involved and receive their emails, you'll be delighted at the great causes this group champions.