An article in Forbes Magazine "As Flash Memory Sales Grow, Some Formats Lose Out" states that the smaller SD format, which fits is smaller devices like cell phones, could ultimately make the compact flash cards appearing in most of our digital cameras obsolete.
"in the past year, the SD memory card's monthly market share has surged. By last November, 42% of all aftermarket flash memory cards sold in the United States were in the SD format. CompactFlash, its closest competitor, accounted for less than 26%..." "The SD format, available in both regular and mini sizes, is expected to forge ahead. This year, SanDisk plans to introduce a 1-gigabyte version of the SD memory card, up from 512 megabytes, and plans 2-gigabyte and 3-gigabyte versions for succeeding years . . . By 2006, we will have SD cards with sufficient capacity and transfer speed to record high-definition video..." The entire article can be found here: http://www.forbes.com/business/2004/02/04/0204flashmemorypinnacor_ii.html