Microsoft still hasn't gotten any more specific than "holiday 2010" for a Windows Phone 7 launch date, but it looks like we may now have a bit more specificity courtesy of Australian carrier Telstra. According to a leaked snippet from a purportedly authentic Telstra roadmap, the hereto unheard of Windows Phone 7-based HTC Mozart will be launching sometime in October -- presumably coinciding with the launch of Windows Phone 7 itself. As you may be able to tell, however, the phone pictured is actually a mockup of an HTC Desire, but none other than