'As of Tuesday, Google has thanked 12 individuals, groups or companies for privately disclosing flaws in its products, including an individual or group using the name "Yahoo! Paranoids."'
Google Thanks You
People and organizations with an interest in security issues have made a tremendous contribution to the quality of the online experience. We are grateful for the responsible disclosure of security vulnerabilities in our software. On behalf of our millions of users, would like to thank the following individuals and organizations for going out of their way to improve the Google experience for everyone:
Alex Shipp, Messagelabs
Bryan Jeffries
Castlecops
H D Moore
Jeremiah Grossman
Johannes Fahrenkrug
Martin Straka
Team Cymru
Yahoo! Paranoids
Wayne Porter & Chris Boyd, FaceTime Communications
Alex Eckelberry, Sunbelt Software
Richard Forand
http://www.google.com/corporate/security.html