I've been wanting to run that line for some time now. Here's one guy doing it. He's the first I've seen to do it in just a creekboat (everyone else was in a longboat) but nonetheless its a pretty badass move. Just don't mess it up or you'll definitely piton and maybe pin.

Here's the line:
http://www.class5photo.net/Cheoah%20Feb%2021/content/9V8O0810_large.html