The subject of jet boats was mentioned in the New Old School 2 thread and it reminded me of this...
On the larger west coast rivers jet boats are used for tours up river. It's a blast in the summer when on the coastal temp is 65 degrees but rises to 100+ just past the first set of hills. I've done this on both the Rogue river in southern Oregon and the Klamath river about an hours drive north of my place in northern CA. If any of you ever make it out this way it is a "must do".
I called the river boat company to get the stats on this boat before posting. The video below shows what you get when you put three 464 Vortex engines on a boat that'll carry 38 people on plane through 6 inches of water.
http://www.webvideomedia.net/jerryswebvideo.html