What are your thoughts on integrating your app into Facebook?

Yesterday Facebook accepted my application ScienceHack into the applications directory. So far, it’s been a huge success, I am getting great exposure to my target audience and every time someone adds my application, many more come through the friends feed feature. If you have a start up don’t hesitate to integrate it into Facebook.<p>What are your thoughts?

I suppose if it isn't too much work, why not. While you are at it, also write some widgets for OS X, Google and Yahoo?<p>However, this is the third link today that leads me to the facebook login page. That sucks. Why do you have to login to see the available applications? I don't have a facebook account, so, whatever...