How Much Would You Pay To Have Lunch With Warren Buffett?

A Chinese business man recently paid $600,000 for lunch with Warren Buffett. The money will go to support the Glide Foundation of San Francisco and was auctioned off over eBay. What does that $600k buy you? Well aside from a good meal at Smith and Wollensky you get to pick the Oracle of Omaha's brain about whatever you want. Hmm, 2nd richest man in the world... owner of 60+ companies... where do you even start?