A Joint Venture is simply an arrangement with an ezine publisher where he or she sends out your offer, with an endorsement, to their mailing list. Much like a solo ad, your message is the only thing in this mailing.

The twist here is that you don't pay a dime unless sales are made! The publisher sends your message and you share the revenue based on a split you negotiate. Some Joint Ventures are 50/50, some are 80/20. The percentage depends on the list size of the publisher and the price point of your product.