I’m an avid reader of Smashing Magazine, and welcome their wide variety of blog posts on all aspects of website design and development. I was pleasantly surprised when they announced Color Steam a couple of days ago. The free app is like a version of Adobe Kuler, allowing you to create colour schemes from scratch or from snaps using your iPhone camera. I found it easy to use, and quite fun too. The only downside is that it requires iOS4, so some older iPhone users will be excluded from the experience.
You can download the Color Steam application from the usual place.