Source:   http://live.visitmix.com/Sponsors

Quoting the Mix Sponsors Page:

“

Windows Phone

Windows Phone

With Windows Phone 7 Series, Microsoft offers a fresh approach to phone software, distinguished by smart design and truly integrated experiences that bring to the surface the content people care about from the web and applications. Windows Phone 7 gave us the opportunity to start from scratch and create an application platform that draws on the best tools and technologies available today, to give developers and designers an opportunity to reach an evolving mobile customer. The Windows Phone 7 application platform is based on Silverlight and XNA, two robust and mature frameworks used by hundreds of thousands of developers today to build compelling applications and games for the Web, the PC, and Xbox. Applications and games are built with Visual Studio 2010 and Microsoft Expression Blend. Developers and designers publish their completed applications and games using the Windows Phone Marketplace. Marketplace provides developers and designers an open and structured ecosystem with the structure, transparency, and support they need in order to deliver on high quality, trustworthy experiences for end users.”

Sounds to me from reading this that we’ll find out how to develop for Windows Phone 7 Series with Expression Blend at Mix 10 this year..

For more information on developing for Windows Phones check out..

http://developer.windowsphone.com/