Another thing you have to factor in is the price per GB of CF cards... when i was looking to get some more storage (long term trip with no laptop) the 4GB option was the best bang for your buck.  4x 1GB cards are a lot more expensive than 1x 4GB card... although interesting to note i just had a look on the website i used and they dont sell Sandisk ExIII CF at 1GB any more!  You are still paying £30 for 4 gigs if you use two cards as opposed to £20 if you just use one card...

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography