I was a wakeboarder before I snowboarded and other than being strapped in to a board they are not very much alike. The way you distribute your weight, turn, and the overall feel(the board is shorter and fatter) is much much different. Now being comfortable being strapped to a board will translate over and make things a little easier while learning. The thing I really dislike about it is once you fall you're done. You have to sit there and wait for the boat to come around before you can get going again. With the snowboard you fall and just push yourself back up.
Ok, thanks for the info.