I think she WILL announce, but will do when SHE is ready. Thus far, that approach looks pretty darned good. Huckabee has already dropped out, and Newt has self-destructed in less than a week after announcing. At that rate, she will be "last woman standing" without expending any needed resources.
I rarely watch reality TV, but when Sarah had that phoney baloney good time whining Kate Goselin freezing in the Alaskan rain, I knew she was the next Margaret Thatcher and worthy to be my President. Meanwhile Goselins blessed (but abused) little kids were crawling all over her dad to learn about fish and bugs, and stuff. Todd was on the other side of the island minding his own business. This woman has it and I mean to support her anyway that I can. This is from someone the libs would call sexist, etc.