without permanent rain... raindish isnt that good.
I'd still take it over Keen Eye any day. I've been planning an OU Rain Team for a while now, and tested Pelipper out on it.
It worked much better than I thought it would. A defensive set with Stockpile, Roost, Scald and Hurricane works quite well in the rain when coupled with Rain Dish as a wall. Plus, when people see Pelipper, they don't know what to expect.