With a billion users, it'd be an understatement to say Facebook has done a good job conquering the desktop world. Mobile, however, is the social network's next frontier: although it has a significant presence on every major smartphone and tablet platform, the company has a reputation for bringing its key features to the PC environment long before they arrive on mobile -- if at all. But the April 4th reveal of Facebook Home, a solidly built Android launcher, reflects a change in attitude for Mark Zuckerberg and Co. Instead of simply maintaining a smartphone presence, Facebook is ready to go to battle and is
