Facebook has been sitting on a gold mine: users’ information. Up until now, the company has used this to target ads within the site. But now, Facebook could soon launch an external ad network, using data from within the social network. For instance, information from your interests and likes could be used to create targeted ads on websites away from Facebook. It’s not yet known exactly what this could look like, but Emergence Capital General Partner Kevin Spain talked with AllFacebook about how it would change online advertising.