Have you checked the upcoming Windows Phone 7 yet?
Posted by Ray Comas on Wed, May 26, 2010
By Thanksgiving 2010 we should start seeing in stores smart phones running the latest Windows Phone 7 OS. This new concept brings together the Zune social and online music and video service, along with the XBox Live experience, Office, Personal Hub (for social sites such as Facebook and Twitter), and Marketplace (app store). Exciting? Yes, but it will be a tough race against the well positioned Apple's iPhone and the emerging Google's Android.
Here is a short clip with a windows phone 7 demo:
For more information regarding Windows Phone 7 check this website.