Google just announced a new Friend Connect API is available for developers to use to intergrate Friend Connect more into a website. It was announced at #pubcon and there is an official blog post about it on the Google Social Web Blog.
It did not take long for the WordPress plugin guru Joost de Valk to take the sample code and create a Friend Connect commenting WordPress plugin. The plugin allows you to sign in to a WordPress blog using your Google Friend Connect account and comment. This is similar to how many Facebook Connect has been implemented on sites like TechCrunch for example. If you run a WordPress blog you might want to check the plugin out. It is easy to install and setup. I had it running here in under five minutes.
Once installed people should see an image below the comment for that they can use to login and comment using their Google account.