Business Sense is a 2-column theme perfect for a business blog or site.
Extended is a 2-column theme with a Web 2.0 look and bright colors.
Fotosky is a 3-column theme with 3-column footer that features a clean and simple design.
Lizard is a new dark skin for the Shifter theme that allows you to choose between 4 page widths including fluid width
New Yorker is a 3-column, fluid, newspaper-style theme with lots of window dressing.
Tech Moz is a 2-column theme with beautiful lines and colors.