If you go to the Southwest Airlines board, you can read about a few people who have Companion Passes. In recent years, with the double credit for Internet booking, there are actually a lot of people who have Companion Passes. And you can use them with a free Rapid Rewards ticket. In other words, both passengers fly free. It's really a great deal, but the people I've known over the years who've had them rarely use them.

Oh, and to stay on topic for this thread, there's another Southwest-initiated fare sale going on!!