Say this for Google: The company does not like to have its rivals grab all the attention. Less than a day after Facebook announced it would link up Facebook Connect across Yahoo (NSDQ: YHOO) properties, Google (NSDQ: GOOG) announced the integration of its own identity platform with Twitter. People will now be able to log into any of the nine million sites that use Google Friend Connect with their Twitter logins; once they do so, they will be able to easily share some content from those sites via Twitter. Sites that use Google Friend Connect get the Twitter integration automatically. So, it looks like Google is trying to give those sites another reason to stick with its service. This follows a series of updates to Friend Connect earlier this month. A war among the web identity giants, perhaps?