Clipboards are great tools to keep on hand for various activities... unfortunately they can be difficult to keep on hand. Either they wander off, or are borrowed by other teachers and somehow lost, or are "borrowed" by other teachers and never heard from again. I've found that overt personalization not only helps cut down on dwindling numbers, but certainly makes them more fun.
As always, I'm a fan of Snoopification as well. A Sharpie and a projector are all you need!