saw this yestarday. How about this for a lazy river?
http://screamscape.com/html/water_parks.htm#Schlitterbahn
I am a Screamscape junkie as well, and that does look fantastic. I was in Dollywood last year and they had a lazy river that was nice, it had a long high waterfall the you could stand under and let the later beat down on you.
It was the best part of the entire thing. Come on White Water you can do it....... Now if we can convince White water to install a little shade.....