Does this include the (presumably) thousands of people who 'created' an app in order to get access to the Timeline feature, as explained on Techcrunch?
I would assume not since you don't need access to any form of web hosting to create an app on Facebook. You simply fill out a few fields and click submit.
It probably helps a lot that free apps are unloaded when idle, then reloaded on demand when someone is actually making a request. Ideally, the cost could approach the disk space of 30k small git repositories.
Of course, the vast majority of them will be test apps, but it's still an interesting metric of the interest in both platforms. Even if Heroku makes it super easy, creating an app still involves at least creating an account with them, installing their command-line stuff, etc.
