Here's the situation. You're sitting with a friend when she gives you some great information that you want to write down. Or, you want to share something with her, but your Mac is not running, and it seems like a hassle to wait for it to boot just to complete that simple exchange. What's a nerd to do?
How about cover the lid of your MacBook Pro with chalkboard paint? That's exactly what Russell Davies did, and the BlackBoard Pro was born. It's got a certain "Little House on the Prairie Schoolhouse" charm, and as Russell says, "...there's something very satisfying about crossing off a to do by licking your finger and smearing it out."