I would like to see all the contextual advertising networks like Google AdSense, YPN (Yahoo Publishing Network), Chitika, etc. have an option where, instead of getting a check or electronic payment to your bank account, you could donate your revenue earnings directly to a charity of your choice.

Does anybody know if an ad network is offering that already? Do you know any bloggers who donate their AdSense revenue to charity? I am thinking of putting AdSense ads on my blogs, this one included, and donating the ad proceeds to charity.