I love the protection and ruggedness of my Pelican CF card holder cases. Here is what I use.
PELICAN CASE DESERVES ALL CAPS!
It's seriously really awesome. You can throw it in a raging river of fire and it would come out unscathed (untested).
I use ThinkTank "Pixel Pocket Rocket" holders. I find the 10 CF card capacity plus the area for business cards ideal (I shoot weddings). I used to use the Gepe, but found it too stiff when trying to pull CF cards out in a hurry, and had no need for the waterproof/crushproof case. However if you tend to shoot a lot of wildlife, outdoors, etc., the Gepe case is ideal.