Most folks shoot under the rain, it's pretty hard to shoot over the rain unless you are flying...
What specifically are you looking for about shooting in the rain?
I shoot out in the rain all the time, including yesterday with 40 mph winds and about 1" of rain during the day. With a downpour like that I put raincovers on my camera and lens, it's a pain and more difficult to get shots, but it's better than getting no shots or losing equipment. If it's just a light drizzle, since I shoot with top level gear that's sealed, I don't worry much about things getting wet.
It's also important to keep yourself warm and dry. I wear Gortex or Omnitech from head to toe.