The Revolution doesn't really have a wide attachment point for a mounting board.
The YakAttack GT90s and ScrewBalls create a great attachment point on the gunwale to create a removable mounting board.
I've been playing around with this idea for a while but I never put out a final product.
This photo was my first attempt at seeing how well the Marineboard holds on to the GT90s on my Revolution. It was pretty darn sturdy. You could add even more stability by using 2 Screwballs in parallel.
Also, Scrumpy posted a cutting board he attached to some GearTracks. http://www.hobiecat.com/forums/viewtopic.php?f=11&t=46291&p=199047&hilit=cutting+cutting+board#p199047
This idea could also be adapted for a mounting board.
*Update* Funny! I just Googled the Madfrog product and it seems that his Sideboard produce is the same thing as what I had made. Seems like every time I come up with something, someone else has already thought of it