Good idea. I'm fascinated by how few of my "professional" clients (i.e. - corporate, in-house creative departments) EVER calibrate their monitors. It's an ongoing tussle when they say, "The color looks off" and I ask when they last calibrated their monitor. Crickets. I say, "I calibrate mine every month", so I know they are accurate. I've had clients say, "Well, the consumer doesn't have calibrated monitors, so why should I?" I tell them so they know the color is correct even though 90% out there are probably looking at crappy screens.
It's a worthwhile endeavor you did this. Fingers crossed a few clients bother to use it.