FYI, in addition (this is partially off-topic, by the way...) in addition to SD cards being way cheaper overall, they are also (as far as I can tell) objectively faster than CF cards.  In other words, one cannot find CF cards as fast as the fastest SD cards - and those SD cards are still generally cheaper than slower CF cards.  They're also smaller.  I really don't understand the preference for CF cards - though I have had better luck with them so far on Macs.