ColourLovers ("fight for love in the colour revolution") is more than another "color picking" site, it's got original content and good sense of community. It's been around since 2004 though I only just now discovered it after the Adobe Kuler site (started in 2006).
To help show you how nice this site is, below I've highlighted some key features.
Clean stats Infographic
A Blog (http://www.colourlovers.com/blog/)