What you need to know about Facebook and Twitter, the new social networks

Facebook and Google are expanding their reach into a new way of communicating with each other.What they have in common is the ability to share, in real time, information with eachother.Both companies are investing heavily in this space.The Facebook-owned Instant Messenger service has seen growth over the past year and a half and is currently valued at over $6 billion.But the new company, Twitter, ...