Sky Light

A combination blue dark and black color, with sky image as a background
Magazine theme

The theme has widgetized header, front page, sidebars, and single posts. For better SEO results, the theme uses custom fields to pull images to the front page.
Simple Things

Fixed width, 2 column theme with a minimalistic style and a touch of typography
Chirp

Chirp

More at: http://weblogtoolscollection.com/archives/2010/03/13/wordpress-theme-releases-for-0313-2/