It annoys me that folks with a poverty of imagination are creating clones of existing apps that have already solved the problem. Another Twitter but open or Facebook with proper privacy..etc. Fail!.
This is much the same. Who knows the types of exciting tools it might spawn?
existing apps that have already solved the problem
Obviously Twitter doesn't solve it for everyone, otherwise you wouldn't see these sort of efforts.
Neither Twitter nor Facebook really tread virgin soil, either.