At present, I have 5 - 8 gig, 5 - 4 gig, 10 - 2 gig, more one gig's than I care to count and even have a half dozen 512mb cards laying around. I have never had a card fail on me, but did have one formatted after a day of shooting by a grandson, Not a problem, I was able to rescue all the photos and Exif data without a problem.... I don't have any of the higher capacities as of yet, but will probably buy one or two when I go home next time. I always carry a large capacity hard drive to store all the photos on and drop all my work on dual layer DVD's for archiving. Here in Oregon, I have a box set up raid 5 and everything goes there just in case of a failure...

Now, If I could only be as good as most of you..... One day, perhaps, one day....