One of the first pieces of news out of the gate at Apple’s WWDC 2012 keynote is its success with mobile apps so far. The company has hit 650,000 apps in the App Store — 225,000 of which are specific to the iPad. Customers have downloaded 30 billion of the apps since they became an option four years ago. Developers also have a good reason to salivate: there are now over 400 million iTunes accounts with credit cards, and they’ve been paid a total of $5 billion for all of their app sales. Whatever pressure exists to support other platforms, Apple wants its coders to know they’re taken care of.