I use facebook to catch up on old classmates, family and collegues. (I was introduced to it via the students at university and college students at my church, most students that I work with are connected via Facebook.)
See devnet’s article for flash development with facebook. (You can also check out the Facebook developer site as well.) I have to admit my first Facebook widget was the Jetman game. But I cheated when I found a way to slow it down using a bandwidth throttler. 
DJ
Here’s an interview from AdobeTV: