Check out www.squaw.com
for pics of the pond crossing. Not quite being towed, but you cross 100 or so feet of pond going 30 mph on your snowboard. The good riders can do 180's and stuff. Pretty fun.
We've also ridden the snow on our wakeboards at a local res before. Both starting up and then ollying down into the water and ollying up onto a snow ledge while riding and going for a 30-40 foot ride on stretch of snow.