Someone in another thread brought up an excellent point - why aren't Federer and Sampras playing these exhibition matches for charity, instead of their own fat wallets? Both have won 40 million USD from playing tennis, both have earned 2 or 5 or 10 times that from endorsements, both are undoubtedly set for life and 100 lives after that. By playing for a charity, not only could they have used their celeb power to find venues and promoters for free, but they would also have brought massive awareness to a charity as well. The net outcome would be millions of dollars to charity from ticket sales & tv advertising, and then millions of dollars saved in advertising for the charity. Last night on Letterman I saw Bill Clinton, advertising his new book 'Giving'. Great idea, write a book about charitable donations, increase awareness, encourage people to give. Fantastic. I then spent 5 mins scratching around the web to find out, let's say, hopefully confirm the hopefully obvious - that he would be doing this for nothing, giving his time to this project. And on the Bill Clinton Foundation website, I find this: Disgusting. When is enough money....enough?