I have seen the Bladefish a few times. My friend just got one in fact. I am pretty skeptical about it as I can't imagine it has enough power to really move someone underwater, but he swears it works good. It is very small and lightweight, maybe 8lbs or so. The one he has has 3 speeds I think and looks all kinds of fancy. Bottom line is if it really works well, then it would be an amazing thing.

By the way it did get a gear of the year rating or something like that in one of the print publications.

Let me know if you get to try it. Next time I am down in Florida I will try to convince him to let me give it a whirl.