HowIGotEngaged.com on Facebook
I can't tell you how much we appreciated this drupal module! It was super easy to add a facebook app to interact with our website!
We haven't done anything fancy, but it's a start. Basically engagement stories posted through the facebook application also show up on http://www.howigotengaged.com automatically. Still formulating where to go next with the application, but getting something up and running quickly was fantastically easy!