Don't want to be too harsh, but why would people use this over Twitter or FB status updates? I think the biggest weakness here is that the other users are peopl

Don't want to be too harsh, but why would people use this over Twitter or FB status updates? I think the biggest weakness here is that the other users are people I have no connection to whatsoever. What was your reasoning that this would take off, and was there any niche you had in mind?