i'm always trying to think of new and interesting color combos, and i know there's been some discussion about color wheels and whatnot on the forum, so i thought this site might help!
http://labs.ideeinc.com/multicolr
basically, you pick out color combinations that you'd like to put together and it brings up sets of images on flickr that contain the colors you specify. for me, that really helps because even though these aren't necessarily pictures of clothes, it's easy to see in them whether certain combinations are soothing to the eye or just...look icky. sometimes colors go together you might not even think of! might not work for everyone, i know, but i figure it may help some!