Facebook runs on their new F8 architecture allowing you to build “facebook applications” which are basically a more powerful way of building “widgets”. Think “widgets on steroids hooked into the social architecture of the facebook network engine”. There are some tutorials on http://developer.facebook.com as well as a video of what F8 is and what it can do (last time I was at that site). Don’t worry about the advanced features, if you want to build a simpler widget lacking the networking stuff just leave it out. You can also build custom content panes for any business-related profile you create.