I shoot RAW with the primary card being in the CF slot. I then send the jpgs to the SD card slot. At the end of the day I back up the CF's to my Nexto backup drive and then using an adapter I load the jpgs onto my ipad. That way I get to see what I shot that day and I don't have to carry my computer with me on a trip to do so.
Not saying this is the way to do it, but it seems to work well for me.