Ever wanted to know about the new features on Facebook and try them out before anyone else? Well now you can, with Facebook Prototypes. To activate a feature in the making, open your Applications menu and click the “Browse More Applications” link at the bottom of the list. Once that page loads, select “Prototypes” from the left hand sidebar. It’s the last one on the list. Once you click on it, you’ll see a few new prototypes that you can activate. Select one from the list. When the page loads, click on the “Activate Prototype” button underneath the profile picture on that page. You will see that feature working when you browse the site.
Have fun! Go there now: http://www.facebook.com/apps/directory.php?app_type=6&category=0