I've been hearing a lot of people using the word "media buying" interchangeably between different companies and just people in general online. You know, such as what they refer to as media buying and what sites they do media buying on. Now my question for you, what do you consider "Online Media Buying?" Would you consider the following networks as online media advertising networks: Facebook MySpace Plenty Of Fish AOL Advertising I've heard the word "social advertising" and "media buying" for the following above or would you consider the following a more of a "media advertising network:" Pulse 360 Ad Blade Burst Media I'd love to hear your opinions on what you define as a "media network."