IBM, Google, Microsoft, Yahoo and VeriSign have joined the board of the OpenID Foundation, which puts consumers a little closer to being able to use a single sign-on when surf the Web. The foundation was created in June, although the technology to support OpenID has been around for a couple of years. It enables people to use a single log-on and password at any Web site that supports OpenID technology. More than 10,000 Web sites accept OpenIDs, and about 250 million OpenIDs exist.