[thedudesatx]

How long can she wait to announce? Most of the big dogs came out with exploratory committees in January 2007.

[blarney]

As far as I know she can wait as long as she wants. It would be safe to say she has already explored I think.

[meadsjn]

How long can she wait to announce? Most of the big dogs came out with exploratory committees in January 2007.

So she could "come out with exploratory committee in January 2011", and be right on schedule; or she could schedule it however she wishes, and she'd still be right on schedule.