Unfortunately ther have not been many DS movement at the German Games Convention, but as I went through IGN's website, and the Official site of the exhibition I collected some urls about the DS's state.
HERE you will find some Yu-Gi-Oh: Nightmare Troubadour screens
HERE are some Mario Kart DS screens
HERE Advance Wars: Dual Strike screens
HERE Metroid Prime: Hunters screens
HERE New Super Mario Bros