Ringbinder has been updated; is a free WordPress theme, two-column, with a right sidebar, it’s now compatible with WordPress version 2.7 upwards, and all set for threaded comments
Old Popular Yolk is a free WordPress theme that is easy to customise and minimal, featuring a print stylesheet and some exciting CSS3 treats. Supports threaded comments for WordPress 2.7 and beyond. Aligned to a vertical and horizontal grid, with a whiff of the International Typographic Style
wpShow [removed, premium theme]
wpShow is a video theme for your blog enables you to feature videos as posts alongside with the regular blog posts. Widget and gravatar ready and supports three different styles.
Are you a theme author? Submit your theme to get listed in these releases.