Our favorites are probably the simple yet fun Mokeskine-notebook from Rayman Raving Rabbids, or the Little Big Planet-esque Puzzle World Twilight landscape painting. Check out our gallery below of images from the 2007 and 2008 shows and pick out your favorite. There's some really good desktop wallpaper fodder in there if you click the high rez button.
For more Into the Pixel art, check out the galleries on their site. If you're in the Los Angeles area, the exhibition will be open to the public during this year's E for All, from October 3rd through the 5th.