Brian Pokorny talked about a distinction between the applications that focus on the front camera more than the back camera in the devices. I think he is right about the comfort that the younger generation (less than 25 year old) has to be in front of a camera. We observed it with vChatter also. He is also right that the front camera is about faces while the back camera is more about the things.
For many young people who are using netbooks or tablets, the only camera they have is the front camera. In those cases it is all about the faces, it is all about their faces, the faces of their friends and interesting people they meet online.
Here is his slide modified to show where vChatter fits. [Photo courtesy Brian Pokorny and TechCrunch]