This sort of growth is phenomenal, but what I would like to note is that it DID NOT happen OVERNIGHT. In fact it happened over years. Yes, there might be close to 20 million active users and something like 30 billion pageviews per month but it took time. And yes Facebook is said to be the largest photosharing site in the world, but again, that took time. So to all you startups out there, breath, take your time and grow your product, Facebook was not built in a day, nor was Rome apparently.