PodOne and
PodTwo are monochrome themes for the iPod Classic, that make use of user-settable foreground and background colors (Theme Settings -> Colours). The main themes try to mimic the original iPod's gray LCD display. Please direct your questions, suggestions and comments to this thread.
Download
PodOne and
PodTwo on the Rockbox Themes site.
All of my work in progress on Rockbox themes is available on my Subversion repository:
svn co svn://caudec.net/rbthemes