Google has announced that users will now be able to join any of the nine million sites that use Google Friend Connect with their Twitter login. That’s great for users: one more quick and simple way to join sites without having to re-enter all of their information, choose a new password, etc.
The bonus for site owners is that once the person has signed in with their Twitter account, they can easily tweet about your site, share discussions from the comments gadget, and invite their own friends to your site via Twitter.

If you found this blog post helpful, then you'll love the hundreds of tips, real-life examples, and proven strategies that you'll find in my Hands-on Guide to Starting a Niche Social Network!
The
simple feature
Where
to find
An
easy-
One
change