As Windows Phone 7 Marketplace surpassess 40,000 apps, we know that more and more developers are choosing to develop awesome apps for Windows Phone 7!  If you haven't done so already, make sure that you download the Windows Phone SDK 7.1 online here!   This SDK allows you to create apps and games for both Windows Phone 7.5 and 7.0. 

With in-app advertisements, now it's even easier for you to make money from your apps with the Microsoft Advertising SDK for Windows Phone, which is now built in the Windows Phone SDK!  Get started and download this SDK today!!