It may still be known as the Treo 850 in some circles, but you see here is among the first live pictures of the upcoming Palm Treo Pro. This is the latest addition to the Treo line and, as far as we can tell, it will be running on some version of Windows Mobile rather than a new Palm OS.

Style-wise, this could be the most beautiful Palm Treo to date. It borrows certain elements from the Palm Centro, but dresses it up for the fashion-conscious business crowd. In terms of size, the Treo Pro seems to fit between the Centro and the current Treos, making it slightly more pocketable than before.

It’s still largely unconfirmed, of course, we are led to believe that the Palm Treo Pro will feature a touchscreen display, QWERTY’ keyboard, integrated Wi-Fi, camera, 3.5mm stereo headset jack, microUSB, IR, and expansion card slot.