Microsoft's driving home the point that developers are going to know exactly what kind of hardware they're targeting as they whip up Windows Phone 7 Series apps -- and naturally, a biggie is screen resolution since that affects how UI elements are going to be placed, how cool they can look, and how small they can realistically be. In a session at MIX10, Microsoft's Charlie Kindel has laid down the law that WP7S will be 800 x 480 -- just 800 x 480 -- at launch, a message we heard at MWC last month, but the new tidbit here is that there'll be 480 x 320 in the pipe for an unannounced later date. All devices
