SEO Adsense is a simple two column WordPress theme built for Google Adsense (3 units per page, and one linkunit ~ the maximum Google allows).
Iowa Autumn is a two column, fixed width, widget ready theme by Bill Hilton with a brown color scheme.
Translucent Fluidity is a two column pink, widget ready WordPress theme.
Diavola is a dark gray and red three column theme.
Set of four themes by TigerTom optimized for search engines.