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As opposed to OpenID, which allows users to access a number of sites with one set of identification, Facebook Connect also offers the ability to publish content posted on those sites back to Facebook.

The company cites the example of a restaurant review posted on partner site CitySearch, which can then be set to appear on your Facebook profile. Friends will also be informed when you've posted something to one of these other sites, whether that's a blog, review or comment on a forum.

The feature is opt in, and is currently being rolled out across partner sites such as TechCrunch. Facebook founder Mark Zuckerberg has also issued requests for members to take the scheme to the masses.

"Obviously our launch partners don't cover all the websites you use on a daily basis, so if you want to see this list grow, get in touch with your favorite websites, developers, and services, and tell them you want to connect," he says on the Facebook blog.

"With your help, we can all share more information across the web."