I purchased the Cool Foot a month ago and thought I'd put up a post about a pretty good product. It's a 1/4" of EVA foam that you stick over the pedal. They sell them for Minn Kota and Motoguide trolling motor pedals. They have 14 different colors and I bought the gray. Fished it in rain and it does give more traction than the regular pedal. Can't be sure of the longevity of the product but at $9.99 each I'll get a new one when it gets trashed.
I give this product an A for form, fit and function.
http://www.tacklewarehouse.com/descpage-CFKOTA.html 
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If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsel or your arms. Crouch down and lick the hands of those who feed you. May your chains set lightly upon you. May posterity forget that ye were our countrymen.
- Samuel Adams