I saw these Grip and Stitch pads being demoed at the Paducah Quilt Show this year, and while they seemed to work well, couldn't get over the price. I wondered if you could easily exchange them for scrub sponges, and you just answered my question!
You can see them here,
http://clevercrafttools.com/shop_online.html
Sponges are much more economical. Thanks!