iGoogle transmogrifies into a Social Network

Google has long used its personalized homepage, iGoogle, as a launching point for its foray into social-networking applications. Any developer who builds an OpenSocial app, for instance, can make it work as a widget (er, gadget) on iGoogle. So far, it’s been more of a personal home page. But now iGoogle is taking another step towards becoming a full-fledged social network in its own right.