Jared Newman at TIME.com:
Work is already underway. The OpenID Foundation is coming out with an open source project called Account Chooser, which lets you use a trusted service such as Google to log into other sites. Although Facebook, Twitter and even OpenID already offer this type of universal login, Account Chooser, which was mainly developed by Google, aims to make it more inviting. Instead of seeing the typical login and password fields when you’re signing in at a new site, with Account Chooser you’ll see a slick-looking box that lists your trusted accounts, and all you do is click on the account name to sign in.
That would make things easier, but also create a situation where access to one trusted account could give a hacker everything. We need a better solution, but my guess is we’ll be waiting a long time for one. There’s just too many players involved.