Build a cool Windows Phone 7 app and get the chance to catch a free ride to this year’s Worldwide Partner Conference.

Not only can you earn yourself some great prizes with Think.Dev Rewards, you can also enter the WPC 2011 Windows Phone 7 App Challenge Contest. You can participate by developing an application, evaluating and scoring applications, or both. The terms and conditions provide information about the types of applications you can enter, as well as the contest information and dates.

Important Dates

Begin: March 25, 2011

End: June 6, 2011

Final judging: July 10-14, 2011

For your entry to be valid, your application must meet Microsoft’s requirements for applications and be accepted by Microsoft.

The application also must be available for download on Marketplace by June 6, 2011.