Here is a news article about SUP on The US National Whitewater Center Course. Check out the article here with some video clips of the action:
http://www.ridestride.com/ssp/news?news_id=30
The whitewater course is a perfect place for getting better at SUP in whitewater. The pool drop senario works really well for whitewater SUP. The M wave rapid is a very surfable wave as well.

This conveyor belt actually takes you back to the top of the course for another run. That is the best part of the whole thing.