I've always been really athletic which really helped because when I first started doing the training for Bulletproof Monk it required so much strength that if I didn't have a base I don't really know what I would have done.
For the first time we're allowing developers who don't work at Facebook to develop applications just as if they were. That's a big deal because it means that all developers have a new way of doing business if they choose to take advantage of it. There are whole companies that are forming whose only product is a Facebook Platform application.