Is it possible to start with a single color and get a suggested color theme? If not, please consider that a suggestion. I often spot a color I love from someplace else and then struggle to select complementary colors around it.
I have a tool written mainly for myself cause i'll hate adobe kuler for using flash and wasting a lot of screen-space.
I will continue to improve this tool, and push it on github or bitbucket, so then everyone can view and improve the code.
Bug Tracker/Feature requests: http://dev.zaku.eu/colourco.de/issues