Here a clip of my version of icy water using Hetzen's suggested node network as in
http://forums.planetside.co.uk/index.php?topic=8611.0Be aware that the results obtained are very dependent on the underlying terrain shape and colour, and that it push render times up high.
I found that one of the main parameters affecting the overall pattern of the ice is the noise stretch within the Fractal breakup of the Ice layer. Small changes can make big differences, and as usual changing one thing at a time is more productive.
Please post any images created using your settings and thanks again to Hetzen.