[wheelbarrow]

Try the Super Stream Cleats. They're $50 and I've yet to slip with these things on. They've been mentioned before on this board, and someone said to be careful about stepping on your fly line while wearing these. They'll probably cut through your line. They have felt and aluminum on the bottom. I don't really see the point of the felt, though, since the aluminum sticks out enough that the felt rarely touches the rock.

You can see them at:

http://www.kman.com/Catalog/Page058/Page058.htm

They fit over your existing shoe. Works well for me since I have old, cheap "Steel-shank" rubber waders with rubber boot soles.