Facebook filled for IPO yesterday. We are not going to bore you with the technical information about it, as those are mostly of interest to banks and their corporate clients at this point, but the documents submitted mention a few quite interesting facts about the social network.

Obviously, the network still has not reached saturation point as its user base keeps growing. By the end of last year Facebook had 845 million users, who formed 100 billion friendships, uploaded 250 million photos per day and generated 2.7 billion daily likes.

This week twitter started a larger rollout of its enhance brand pages. We first caught wind of these new brand pages back in early December 2011 and the first page we saw was from Pepsi. Enhance brand pages allow different companies, brands, organizations, and others to set up twitter pages that more closely reflect the corporate personality and color schemes of the businesses.

Yesterday, several new brand pages rolled out on twitter, including pages for NBC news, Volkswagen, the Huffington Post, and several others.