In an earlier post, I mentioned that we had struggled with the decision of whether to build a Facebook app. On one hand, I think the site is a fad that is using it's open platform as bait for a bigger valuation. On the other hand, it seemed like everyone was building there. We didn't want to miss an opportunity to serve our audience better.

Ultimately, based on member feedback (and our gut feeling), we bailed on the app.

Tim O'Reilly just posted some data that shows that we definitely made the right decision.

"The good news has already been widely disseminated: there are nearly 5000 Facebook applications, and the top applications have tens of millions of installs and millions of active users. The bad news, alas, is in our report: 87% of the usage goes to only 84 applications! Only 45 applications have more than 100,000 active users.
"

There are only 3 of us working on Profilactic (and we work on it on a barely part-time basis). We have to spend our time building things that help the most members of Profilactic, so no Facebook app from us.