Call me cynical but I'm not convinced by Mr Gates or his foundation. Like many of us on here, I too lived through 'the Microsoft years', I watched Microsoft under his leadership effectively dominate their competition using fair means and foul. Case in point, Microsoft are the first to be mentioned in the Examples section of the Wikipedia page on FUD.
I've subsequently listened to him in interviews over the last 10 months, and the man cannot stop himself, he sees a large mound of money and his old cutthroat competitive spirit comes surging back.
In some interviews it's like he's out of breath just getting out his own way, to rubbish his rivals and convince us to buy 'his vaccine'.