Create a social community using Google Friend Connect. Easily add many different gadgets.
Upload the google-friend-connect folder to your plugin directory and activate it.
Go to http://www.google.com/friendconnect/ and signup for your site if you haven't already. Continue till you have uploaded the files canvas.html and rpc_relay.html to your site and verifyied your site with Google Friend Connect.
Use the NUMBER ONLY. You may enter the location of your canvas.html and rpc_relay.html files now on the GFC Integration settings page as well (defaults to root directory "/" - should work fine without changing for most people)
See the FAQ for a list of shortcodes to use in your posts.