Missed opportunity to call this a "Phil-Anthropic" partnership. The word doesn't appear once in TFA. Highly disappointed.

Seeing some of the comments here speculating about ulterior motives, I'd like to say there are probably none other than the usual (goodwill, publicity, taxes, etc.) A little known aspect of the Gates Foundation finances, their problem really isn't getting more money. Their biggest problem is spending their money faster than it grows.

Bill-Anthropic ;)