Great to see Kayak Polo growing! We have an organized weekly game in Pittsburgh although it is much more for the novice and meant to simply get people out on the river. People seem to be really enjoying it and can’t get enough. I even had to make merchandise to feed the interest.
http://www.cafepress.com/kayak_polo

Look us up if you are in Pittsburgh and want to join a really laid back version of KP. We could use some tips from more serious players. You can find us through our Yahoo group:
http://groups.yahoo.com/group/PittsburghKayakPolo/