Here’s a simple 3-column WordPress 1.5 theme called Trident.
I found some WordPress Templates on a German language website. I believe these are for version 1.2.
The ShadedGrey theme for WordPress 1.5 from wpthemes.info.
Here’s the Midevil WordPress 1.2 theme and the Obsidian WordPress 1.5 theme.
Here’s the latest theme XT2 from Arzel.
GreenTrack is the first theme released by WP Themes.info.
Way Too Clean 1.0 WordPress 1.5 theme. Found via Weblog Tools Collection
Benevolence is a two column layout theme for WordPress 1.5.
GreenTrees theme for WordPress 1.5.
New WordPress theme Mashed Spuds.