Rapha has been doing cargo bibs (and NOT bibs) for a couple years. Everyone that tries them loves them. Last week, another guy and I both ended up at the same place for a post-ride beer and sandwich. He was wearing the cargo NOT bibs. He said that he also had the cargo bibs, that they were the best and that he wouldn't buy anything else now. Said that they really came in handy on long rides/races, or when you have a vest/jacket that blocks jersey pocket access, etc.
I'll prolly get a set in the spring.