paintings are ment to be painted right? so why not in minecraft. you could craft a painting and make paint with different dyes and a bowl, giving you colored paint. then place your painting or canvas at some sort of art station, then you would be able to select any sort of color in your inventory, and paint it yourself. would you think this would be a cool addition to minecraft?
Has been suggested along with user created books since the addition of maps, due to each map having its own value. No official word though, but I would love having my own painting of my cartoon characters.