MG Siegler has been writing recently about the "great unbundling" of Facebook and how mobile apps are increasingly good at one thing only: Instagram at sharing Photos, Paper for reading the news, and now WhatsApp + Messenger for communication. It's becoming increasingly true as we see Facebook trying to buy the new dominant players in any space that could be a threat in the areas it holds dear: sharing photos, statuses, or anything else it deems important.

I would have to think that the stock drop is due to the price they're paying for a startup that had $8 million in funding.