I'm still trying to understand why this is reported on CNet but not mentioned anywhere in Zoho's official blog...

Zoho to integrate with Google sign-on

However, assuming this is true, that will be one less login/password combination to remember someday. It is a little surprising to learn about this though. I can't think of any other service that Google has partnered with in this way. I still can't login to YouTube or GrandCentral with a Google login and Google owns those properties.