Amazon's started a new friend-get-a-friend online marketing campaign called "Share the Love" (ok only a West Coast marketer would come up with a name like that.) Anyway, it's kind of clever so you might want to test something like it at your own site.

After Amazon.com buyers purchase something, instead of getting the regular Confirmation Page, they now get a page that asks them to enter the email addresses of their friends, who will be sent a 10% discount on the products the original buyers just purchased. So if you bought the new VHS of Buffy the Vampire Slayer's third season, you can send all your pals a 10% coupon to buy the same thing.

I don't like some things about this -- it might feel spammy to the recipient depending on how the discount email is worded and who it's sent from (the merchant or the customer). BUT, it's the kernal of a good idea. One I've seen before, but always worth repeating. i.e. using your confirmation (aka thank you page) to urge your visitors to take another action. Send a coupon to a friend, sign up for other newsletters, purchase related products, read white papers .... the list is endless.