There's always coupons here:
http://www.fatwallet.com/t/18/243140
So, by wet are we talking hours in heavy downpours? My primary consideration is that they can keep stuff mostly dry for about 30 minutes in a heavy drizzle. My commute is short enough so that if it's really pouring, I'll try to wait it out either at home or work. I've also got fenders on my bike so that should cut down some on the splash factor, too.