Wait for what they are going to do with the cash! Selling above book value is good thing, but where the money would go is more important. And you will know that on July 30th. I am pretty sure that analysts will ask about that on Q&A session if the company won't mention it in press release. It is insane to sit on that much cash and pay 8.75% interest on 2016 notes ... $52mill/year or so! After all, their CAPEX will be smaller, 2014 prices will be higher for PRB and Met.
I just hope that the management will be more open about it instead of saying "we are looking for best ways to invest the cash to benefit shareholders".