I really like my Frogg Toggs. Light weight, water proof and breathable. Got mine at Cycle Gear.

http://www.cyclegear.com/CycleGear/T...026_59409_1936

I got the matching pants too. The few times I've ridden in rain so far (not for extended periods) my feet never got wet. I guess that's a bonus for having the engine blocking your feet.