Mals – Ecommerce
I saw this in action at www.historyaccordingtobob.com where he is selling physical and digital products in what appears to be a versatile shopping cart. When Ilooked at the site, you can use it for free. If you want the advanced features its 8 bucks a month. Mals E-commerce
I had a musician friend of mind said she sends rewards to people who forward her newsletter to their friends. Her email list is on Contant Contact and apprently she gets a report of who is forwarding her stuff. Pretty cool.