Have a great solution for you guys.  First off we haven't had much rain here in Oklahoma but...........If you have a Walmart or something similar close by, take a stroll into the sporting goods dept.  Usually somewere close to the camping or fishing areas they will have some moderatly priced (20 -25 dollars) rain gear with elastic cuff sleeves.  These are just about perfect for fitting over a camera lens.  The remainder of the jacket can be used to cover a tripod or the photographer.  Or if you just want to cover the camera, you can always cut the sleeve off and just use from the elbow down.  Hope this idea helps. 

Jadench