Here is an XDA link with some excellent CM7 themes made by Kevin2516 at XDA which include Motoblur, Xperia, Xperia Arc, Gingerblur and Touchwiz. They all work on the Droid and are very complete. The Dev is still adding theme elements and perfecting these themes.
[CM7 Theme Chooser] Sony, Samsung, Motorola themes for CM7 (HDPI/MDPI - Updated 16/5) - xda-developers
Here is a link to all of his themes. He also has a Buuf, INexus, INexusmatte, and Elegant Steel. Dropbox - XDA Themes - Simplify your life