Quote Originally Posted by Nick Zentena
. . . what is [a fisheye] good or bad for?
They keep the fish from bumping into things?

I'm not sure of the angle of view of the Kiev fisheye, but I've seen variations on the concept ranging from what might best be described as "super-wide with field curvature" up to "true" fisheyes that produce round images of 180 or slightly more. They produce a unique perspective when used thoughtfully and creatively, but the look tends to get old rather quickly, IMHO.