During yesterday's conference call to release second quarter financial statements, Apple CFO Peter Oppenheimer revealed that the company has signed up 200,000 developers to date for its iPhone software development kit.

According to Macworld UK, Oppenheimer called the response to the SDK "tremendous" and mentioned that 400 higher education institutions as well as more than one third of Fortune 500 companies are actively creating software for the iPhone.

Apple plans to deliver a major update to the iPhone software, termed iPhone 2.0, in late June. The update will incorporate the company's anticipated App Store, which will allow users to purchase, download and install third party applications for the iPhone. A similar update is also planned for the iPod touch to allow the handset to access the App Store as well. The iPod touch's update won't be free, but has been cited as nominally priced.

Company representatives stated that 1.7 million iPhones had been sold in the second quarter with COO Tim Cook reiterating the statement that Apple is on track to sell 10 million iPhones by the end of 2008.

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