Ben Patterson - RIM still rules the roost when it comes to U.S. smartphone market share. But its aging OS is looking decidedly long in the tooth compared with the iPhone and the latest Android handsets, and its touch-screen Storm and Storm 2 phones have met indifference even among hard-core BlackBerry fans. Now RIM is looking to turn the page with its revamped OS, the touch-enabled 6.0 — and we got a sneak peek Tuesday morning during the annual Wireless Enterprise Symposium in Orlando, Fla.

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