The size of compact flash cards has really become an amazing thing.  We just got in the new Kingston 32GB cards and they are fast and priced right.  Rated at a 133x write speed, these babies are less than $75!  I put one in my Sony A700, set the camera in RAW mode, and I am able to put over 1500 images on the flash memory card.  Truly amazing!  Memory has become so cheap, it’s really hard to believe.  You could really shoot an entire event and put the card away.  No need to put it on another drive unless you need the redundancy for peace of mind.  Come and get em’!