latest Facebook FUD is that the mail product that is expected of Facebook will "kill GMAIL and everyone else". In other news it is even said that this new product is tied to an offering by Microsoft.
Guess what, if there is one thing missing in the social networking world, it is not the offerings by companies like Facebook. Their objective is to profit by selling out the privacy of its customers.
What is missing is an open source offering that competes with the likes of Facebook. The least it will do is provide an alternative. When such a social networking environment includes the Wikimedia communities, the Wikia communities or short, the Wikimedia movement it will be an environment that is about something.