On Tuesday of this week, popular social networking site MySpace announced support for OpenID and integration with their Data Availability initiative. MySpace is launching as an OpenID provider to begin with bringing the grand total of OpenID enabled users on the Internet to well over 500 million users. What's interesting to note about this announcement as well is that MySpace is now layering additional, value-added services on top of the OpenID that make it even more compelling. This is an exciting time for OpenID and its clear the momentum is only just starting to pick up.