I asked that question a while back too. As I understand it and this is coming from a nonairline pilot, YET! but it is a program that airlines participate in and that allows you, if you are part of a CASS approved airline, to jumpseat as much as you want. I believe, not sure, but that it also means backround checks are done with pilots participating in CASS airlines. I think its almost like a special security clearence to jump seat up front. Just look under Majors and CASS approved airlines and there is probably more helpful info too.
Chris