Flickr user Encaja en Camon has posted up some really neat Lego designs. I have always been a fan of Legos grounding up, but my parents never bought them because they where so expensive, its pretty cool seeing someone pull off some video game artwork with them, mainly Sonic.
He has also uploaded some Duck Hunt, Super Mario Bros and Pac Man stuff. Check out his flickr. Below is the finished Sonic Lego piece.