Ohh... sorry I don't have a pic (gotta figure out the posting pics thing some day...). But the thing is that our treadmill has honking big, flat handles that make convenient supports for the "desktop" (really, it's nothing special-- just a plank. Plenty of room for a laptop, drink, phone, a few remotes, etc). The official walking desks are not only expensive, but they are intentionally hobbled with a low max speed. Hubby likes to take the desk off and run, so we have it both ways.

For anyone who is embarrassed by the concept of a walking desk, don't be! Most folks who have them are high-level execs... you are in elite company!