Yesterday, I finally finished an upgrade to Fast JV, adding support for the new "Fast JV Transaction Verification Protocol" (or "TVP"), which will enable any shopping cart system with affiliate support to work with Fast JV to increase sales. Fast JV enables affiliates to offer additional bonuses to customers who buy through their links, and automates the verification of the sales and delivery of the bonus products. The TVP is the "language" Fast JV uses to talk to the seller's shopping cart to verify that a sale has been credited to a particular affiliate.

Technical specifications and free sample code for adding TVP support to a shopping cart system

Fast JV Sales Page