http://www.saveie6.com/index.php Great example of Viral Marketing

• Focused — only insiders (i.e., the target customer of this company) will get it.
• Hilarious — anybody in the web dev world will truly appreciate the irony in “saving IE6″.
• Viral – many ways to spread the word, easy to do so, and clean friendly design.

Good job to the creators of this campaign!