This is a wonderful initiative.

I'm someone who's generally very skeptical about the VC ways of doing things (difficult to really describe my feelings here, let's just say some just seem a bit too unapologetically mercenary in my eyes), so this move really sets apart YC from all the other startup-incubators/VCs.

Watsi is fantastic in every way I can think of. I hope more people are encouraged to create nonprofit companies to solve some real problems (read: non-first-world-problems) in a true hackerly fashion.