Before he took the money from the Yankees, he was projected as sure fire Top Ten NFL pick.  What a season that could have been.  Argh...

MBA's are an investment.  The question is do you see the payoff over the course of a career that outweighs the cost (debt/opportunity cost).  

For most of the top programs (Mich, Duke, NW, Harvard) the answer is unquestionably yes.  Add in the networking benefits, and it is generally a no-brainer.