Reported by the awesome MG Siegler on that website he writes for:
As we understand it, Project Spartan is the codename for a new platform Facebook is on verge of launching. It’s entirely HTML5-based and the aim is to reach some 100 million users in a key place: mobile. More specifically, the initial target is both surprising and awesome: mobile Safari. […]
Facebook will never admit this, but those familiar with the project believe the intention is very clear: to use Apple’s own devices against them to break the stranglehold they have on mobile app distribution.
Just what we need: another app store (™?).
But with Facebook’s immense scale, this is probably going to be interesting, at least.