[blader]

I was speaking as a Facebook application developer responding to the comment about "applications can no longer be viral". I have no idea whether it's working out for Facebook as a whole, but for our own purposes it's looking very good across a whole range of metrics, mostly growth (user acquisition and activation).

As a data point, these guys: http://apps.facebook.com/livingsocial managed to get around 2 million uniques over the past couple of days, mostly from Feed virality. Again I have no idea if it's good for Facebook as a whole (and the only people who can say for sure are people with access to that data at Facebook), but for application developers it's been great.