As an ordinary guy I would have to say my sense of matching colors is not the best. So when it came time to pick out my wedding colors, I just let my wife decide. But if I had known about kuhler beforehand, I am pretty sure that I would have been a lot better equipped.
Essentially kuhler is an Adobe tool (that requires Flash, by the way, so if you're on iDevice, you're out of luck) that offers graphic designers and creative directors different color palettes based on a variety of rules. Users can submit their own personal palettes as well, and obviously since these are just colors there aren't any copyright issues. But I think the coolest thing to do is hit "Create" and make your own palette. The next time I am making something creative or looking for the perfect complementary background color for a photo, this will be my tool of choice. Rock on, Adobe!