http://www.huffingtonpost.com/2011/05/05/mark-zuckerberg-hou...
I don't know if this is the case any more but I am reasonably certain it was some time ago, alas I have no source.
Craig Newmark
Give the money away!
Someone else can do so much more with it.
It really annoys me when people do the "I'm a billionaire who drives a pinto" thing.
Either splurge or give but don't just sit on it.
Charities that give out food to the hungry take the money away from research that could result in genetically modified foods that are extremely cheap and easy to grow.
Charities that provide college scholarships for gifted/athletic/underachieving/overachieving students contribute to overall inflation of the cost of education for everybody else.
Splurging doesn't achieve a net effect of life improvement for society in general, and neither does blind charity.
Bill Gates is a good example of efficient philantropist, instead of donating to charities who spread awareness about malaria or global warming, he invests in lasers that kill malaria mosquitos and deep-ocean technologies that prevent global warming.
Just that it frustrates me that someone who could happily live with $70,000 a year sits on millions or more.
Make use of the money in some way for someone even if its not yourself