Distributed spam filtering. Sure, your spam filter may be hot stuff, but Spamnet takes filtering to the communal level. With its easy install, point and click simplicity, and Outlook support could Spamnet be the SpamCop for the masses?
Crypto guru getting blamed for his software. PGP writer Phil Zimmermann's hate mail goes a little something like this, "Phil -- I hope you can sleep at night with the blood of 5,000 people on your hands." If Phil is guilty of anything so is everyone who has ever used their credit card online, including Mr. Hate Mail.