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T-Mobile and handset maker HTC are taking the cover off the first Android-based cell phone Tuesday at a press conference in New York. The Open Handset Alliance, a group that includes Google, T-Mobile, HTC, Qualcomm, Motorola and others, is billing Android as the first truly open and comprehensive platform for mobile devices.

What will a Google Android-based HTC look like? And how will it shake up the market? Here's what we can discern from leaked photos: It's a touchscreen device with a full, slide-out keyboard. Pricing rumors peg the device at $199, in line with Apple's iPhone 3G.