I've used chalkboard paint all over the house for at least the past 10 years. I love how unexpected it is: you can draw right on it with chalk! I've painted entire walls with it and drawn all over the wall. I've repainted refrigerators and written up grocery lists right onto the doors (and had it photographed for an issue of "Country Home" years ago, too!). I've even painted terra cotta pots and written directly onto the pots words like "Basil" or "Sage."
So, I'm continuing the chalkboard theme (er, obsession?) with this idea: customized chalkboard paint using leftover latex paint.
I had some leftover kelly green paint and thought it would be fun to paint a giant blank artists' canvas with it. I mixed in a few tablespoons of powdered grout (from the hardware store) into a small container full of paint. Mix well! Then I covered the whole canvas with two coats of the homemade chalkboard paint! Voila!
The cool thing is you can keep changing the art up whenever you feel like it. Just wipe it down, let it dry and re-draw, draw, draw away!