Apple's pretty famous for using subscription accounting for the iPhone and Apple TV as a way to bend the rules and offer free software updates after purchase -- basically, instead of putting all the money from the sale on the books at once, the company's accountants spread the revenue out over two years, extending the "transaction" to cover upgrades. That's great for iPhone owners, but it's not so great for Apple or its investors, since the company's stock price doesn't always reflect the true amount of iPhone money coming in -- in fact, Apple earnings reports now include a second, unofficial balance sheet that does away with subscription accounting to show off the real numbers. Yea