This may be the best combined product promotion and charity drive ever.
The idea is that you send an email to a friend which links to a video that has the friend’s name embedded in it. The video promotes donating coats to the homeless and the promotion also offers a discount for buying a coat. If you watch this video, you can see that my name is embedded in it near the end. And, at the very end you can click and send your own customized video to your friends (their names will be embedded).
Go the the main site, too. It’s truly well done. Great graphics tracking the campaign’s progress. And you can even track where your coat has gone.