From Microsoft:
This document provides step-by-step guidance to Web developers on best practices for supporting Information Cards on Web sites. The document walks Web site developers through two different deployment scenarios: sites exclusively using Information Cards for authentication, and mixed-mode sites allowing the use of either passwords or Information Cards.
Examples are given for site sign-in, site sign-up, and handling lost Information Cards, including suggested confirmation text for each of these scenarios. This version is the first release on CNET Download.com.
Other related software:
Software titles