C. J. Clavadetscher "quickshot carl"
If you carry two of these, one in your camera and one in the camera case pocket (don't lose it), you will never run out of memory. Enough capacity at ~4MB/image to shoot and shoot and shoot.  Download at the end of the day if you want, but you have thousands of pictures on one of these. Couple with batteries (see WASABI review) and you can just never stop shooting.