What I do is I keep a fast CF card in my body (only 8gb, 800x) and I shoot shoot shoot. Then when there is a break in the action, I'll put in a 32gb sd card and copy everything over. Remove the sd card, delete the shots on the CF card. Rinse and repeat.
I'm sure others would be concerned about the deleting what is on the CF card just in case a file is corrupted... but that hasn't happened yet...
Wouldn't it just be easier to have a couple extra CF cards to swap out when they get full?