Akon is a two column, simplistic, minimalist, light colored theme for WordPress with a very nice header image. Preview here.
ZedSimple is a simple one column layout. Preview
FlyAway is a 2-column wordpress 2.0 theme with Custom Header support with the header wallpaper by KoL. Preview
Small Potato has released three more themes viz. Quadruple Blue, Zip It and Fruitlicious