Since I feel bad about no one answering - You already recognized that opening up is the trend. Using Facebook is really about the target audience that you're g

Since I feel bad about no one answering - You already recognized that opening up is the trend. Using Facebook is really about the target audience that you're going for - Facebook users have particular expectations and habits online. You get the expectations of the user base by associating yourself with Facebook. This may be useful for a fun application, or even a social application, but beyond that and it gets complicated. For instance, I wouldn't connect any business application to Facebook; linked-in is opening up their api and it may be a better market space for business applications (even though I dislike that crowd). A business application connected to Facebook is for the wrong crowd, and won't take advantage of the viral aspect of using a large existing user base. People also don't look for business applications on Facebook. Think about your target audience first, and then go after them where they congregate.