Ars Technica :: You've heard of the bat signal—now get ready for the cat signal. A diverse crew of Internet businesses, advocacy groups, and lawmakers has banded together to create something called the Internet Defense League. The organization seeks to save the 'Net from bad laws like SOPA. And a cat signal is what the group will use to alert the world when it's protest time.
Explainer - A report by Jon Brodkin, arstechnica.com