David,


   You could be right. I thought the water hole was around 1.5 to 1.7 GHz 
but that the microwave window was around 1 to 10 GHz. The water hole was 
neat in it's day because this region is also a an atmospheric quiet spot. 
Today we have satellites so atmospheric noise may be less of a problem. And 
more importantly the microwave window does not require us to believe in the 
importance of water or local atmospheric conditions.
   If the folks at SETI are still pushing the water hole I suspect that they 
are limited by atmospheric noise caused by budget constraints ( no 
satellites ). All the really cool alien music is broadcast at 10 GHz since 
it's a quiet region and all musicians have 10 fingers ( except for Django ).

Dave M.