There's a lot of momentum and buzz behind "OpenID":http://www.openid.org lately. More and more services and websites are accepting OpenID logins as well as offering OpenID authentication services to its users.
I love this.
After reading "Tim Bray's":http://www.tbray.org/ "post about Sun's implementation of OpenID":http://www.tbray.org/ongoing/When/200x/2007/05/07/OpenID-at-Sun, the wheels in my mind began turning. He explains that Sun's OpenID is only for Sun employees. Ergo: Sun OpenID == Sun employee.