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Apple's iPhone has some 2,000 apps available for download. Of those, 65 have some arguable business application, Ben Worthen notes in a Wall Street Journal blog. Only 3 out of the top 100 most downloaded applications are business-related. The most plausible interpretation of those numbers: iPhone buyers and developers are, 97 times out of 100, uninterested in apps for doing business.But because Worthen writes about "business technology," he looks at the numbers and concludes that "the growth is impressive" — because a month ago, there were zero iPhone business apps. A month ago, there were zero frivolous iPhone apps, too, and they've outgrown business apps 30 to 1. Why not just admit the obvious? People mostly buy iPhones because they're fun. And they install apps for the same reason.