As long as I'm "selling" IKEA stuff (I wish, I just give them money ;-): in their kitchen area, there's a Dralla "cutting board". This is a pleasant piece of flexible matte plastic, a couple of millimeters thick, about the size of two sheets of paper, with rounded corners; I've seen it in dark-gray, blue and red.

I use the Dralla as a writing pad, on the desk; some people seem to like it as a giant mouse-pad. (Not in the photo, the red thing is a thicker, smaller, unused mouse-pad.)