Gwizs' spray shield 3 is pretty effective.
I made one based on the pictures Gwiz had posted. My wife and I each have an AI and we go out together. Saturday we were out in 20-25 mph winds with heavy chop on the Sacramento river. I was getting totally hosed. Buckets of water thrown in my face while my wife stayed dry from the waist up with the spray shield on her boat.
That was all I could take! Last night we made a second one so we could both stay dry.
Here is the post with pics from Gwiz on KFS:
http://kfs.infopop.cc/eve/forums/a/tpc/ ... 9021025404