Ran across this site from another woodworking forum. It shows how to make simple cam-clamps:
http://www.woodshoptips.com/tips/050304/index.htm
I haven't tried it, but it looks like the plan could be easily adapted to use the Domino for making the slots for the bar.
http://www.woodshoptips.com/tips/050304/index.htm
I haven't tried it, but it looks like the plan could be easily adapted to use the Domino for making the slots for the bar.