Microsoft announced it’s new mobile operating system at Mobile World Congress today. I’ve been anticipating this announcement since I first heard about the WP7 plans internally. Now that we’ve shown off the user experience for the new OS the next question is: how do we build apps for it? Well, that part of the story will be told at Microsoft MIX ‘10 in mid-March. It is an awesome developer story and I can’t wait to be able to talk about it publicly!

In the mean time, here are some helpful links for learning more about today’s announcements (via The Official Microsoft Blog):

• Windows Phone on the Microsoft News Center
• Press Release
• An interview with Andy Lees, senior vice president of Microsoft’s Mobile Communications Business
• A video that goes behind the scenes of the Windows Phone 7 Series design
• The Windows Phone 7 Series web site
• Windows Phone on Twitter
• Windows Phone on Facebook
• Windows Phone channel on You Tube
• A blog post showing some of the screenshots and demos of Windows Phone 7 Series
• Channel 9 video interview with Joe Belfiore,  corporate vice president of Windows Phone Program Management

Also…

• Engadget: Windows Phone 7 Series: everything you ever wanted to know
• Gizmodo: Windows Phone 7 Series: Everything Is Different Now

Sign up for MIX here if you want to learn more about developing for Windows Phone 7 Series – as well as all of the other topics at MIX, like Silverlight 4, of course!