Kuler doesn't just give you a list of color schemes, it categorizes them for you, from most popular, newest, highest rated, and random. Also, if you search a color, it will give you a lot of themes to choose from that have that color in it and all variations of that color. ( i.e. if you search red, you will gets results like hot red, vintage red, or spice cabinet). Even cooler is if you search multiple colors at the same time because it will give you those colors in various shades and tints that compliment each other.
So, if you're ever having trouble deciding on colors or can't find just the right match, visit Kuler.