San Fran start-up Boxbe wants to bill email marketers and spammers for sending consumers email. The model works like this: Consumers set up a free email account and defines an approved senders list. Approved senders can email the consumer for free. Anyone else who wants/trys to send the consumer a message will be charged anywhere from $0.03 to $99 (consumers set the price). Here's the twist- Boxbe will give 75% of generated revenue to the consumer.
It's hard to imagine how this will stop spammers (unless everyone switches to Boxbe), but it may change the game for legitimate email marketers.