It will be interesting to see--especially as the iPhone 4 sales continue to mount over the coming weeks--how the next generation iPhone shakes up market share among smartphones in general, and more specifically in the enterprise.

RIM is to compete against the iPhone and iPad, and Microsoft is (finally) launching later this year. Those are the two reigning leaders of the business smartphone market. But, given the tremendous success of the iPhone 4, RIM and Microsoft might be late to the party and have trouble reversing the tide.

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