SilverlightShow.net is running a SilverlightShow Eco Contest! Write a Silverlight-based application that helps support and promote environment-friendly activities, and you can win great prizes, including a trip to MIX10 event in Las Vegas (MIX10 pass, 3-night hotel stay at Mandalay Bay Hotel and 1,000 USD for travel expenses included).

Read official rules here. But hurry, the contest ends on February 15th, 2010.