I'll get us started. I wrote a iPhone application that lets you load up an image from the camera or your photo album and point around in the image to find what color is at that point. Right now it breaks the color down to it's RGB value but I may include an option to see CMYK instead.
I did the project because my girlfriend is an artist and it's embarrasing when we talk about color and I don't know anything about it. I figured I can use this to figure out what color things are around me more precisely. As a side effect, I now have a much better understanding of CoreGraphics which is nice.
Between family fun, friend fun, catching up on sleep and catching up on movies I didn't find enough time to really finish and polish the app but I did prove the concept to myself. I'm hoping to find time over the next month to polish it up and publish it to the app store as a free app.
Hope everyone had a happy holidays.