what is an e-mail sneezer?
In viral marketing, a sneezer is someone who loves your product and tells all her friends. She sneezes and the virus gets passed...one out of ten of the people she passes the "virus" to catches it, and starts sneezing to others. Your best customers are also your best salespeople, and viral marketing takes advantage of that fact. Give those customers good tools to share (sneeze) your service with others.
Seth Godin literally wrote the book on viral marketing. Subscribe to his blog
to learn more about it.
Social networks are a prime place for viral marketing efforts. And let me correct my earlier post, the site you should visit is AddThis.com
. They have a cool widget that allows people to share your website on just about any social network. I think it was here on Lunar Forums where I learned about that tool. What you've got going now is good (Digg, Delicious, Stumble), and AddThis might be better, might not. The Facebook promo with iTunes should work well too.
So someone who loves and uses your site and wants to share it with the world can use that Addthis tool or your existing links, and to share it with someone specific, they'll probably use your email tool. The email that gets sent is in plain text, and doesn't really do your site justice. My guess is a teen girl won't be impressed by a text email. If it were formatted in HTML and carried the look/feel of your site, the recipients will be more likely to click, visit and use your site too.
Hope that helps,