The successor to Windows 7 debuted this past week at the D9 conference, and so far it appears to beWindows Phone 7's interface and tile-style app management bolted on top of Windows 7. Code-named "Windows 8" by Microsoft, the next-generation OS is also expected to be a touch-friendly environment that works seamlessly on tablets, desktops, and laptops.

This week, we also learned that Microsoft is now restricting the number of Windows Phone apps that it will approve from a single developer to 20 per day. Microsoft says the new restriction is aimed at cutting down on "bulk app publishing," a process through which developers can flood the Windows Phone Marketplace with hundreds of apps over the course of just a few days.