If you are a faithful TreeHugger reader, you probably know that our contests are a great way to score free swag from some of the best green retailers on the net. This month, Earth (the shoe company, not the planet) is putting up a $350 gift certificate to the winner of our "Unexpected Green" Contest. Earth manufactures "healthy shoes" made to give you better support and posture through the yoga-inspired "Negative Heel." And, for every pair of shoes you buy and register with them, Earth will donate $1 to EarthShare, non-profit collaboration of environmental and conservation groups. So please check out www.earth.us and show some love to our contest sponsors.