As part of its push to go more social, Google has been attempting to unify its various account profiles into one Google Profile. And now it's more useful. Google's Brad Fitzpatrick has just tweeted out that Google Profiles can now be used as OpenIDs. What this means is that you can sign into any site that accepts OpenID simply by using your Google Profile domain. Luckily, a few months ago Google started allowing these profiles to have vanity URLs , like /mgsiegler, instead of the previous /32090329039402903. Chris Messina, a huge proponent of the open web movement, has just sent out a picture of signing in with OpenID via your Google Profile (below).