scriptygoddessLloyd has a Javascript Color Select Widget (IE 6, and Moz 1.2) here.
Another post on redemption in a blog points to this really cool php class that shows you a range of colors based on the one you put in. The example they have is very cool. (There's also a few other links on redemtion to other color thingys™)
Web-Graphics (finally back!) has a web-based color pickers review.
