Airak and Eoheryn of Landroval, and forum member Fatty_Lumpkin were the three winners. The honorably mentioned screenshot (included above) was taken by Rendo Gnollen. Why did Turbine pick three winners and one honorable mention instead of just saying there are four winners, since there are no prizes anyway? Who knows.
Turbine also assured everyone that there will be another screenshot contest next year, and that DirectX 9 users will also be eligible.