Yet more questions! Sorry guys/gals....im new and trying to learn as much as possible before my purchase this weekend. Memory cards, aside from the obvious capability of holding more pictures etc, is there really a difference between the memory cards? I noticed one 8gb might be 100.00 and the next 40.00. I see a speed rating on the card, but how much does that come into play with cameras? Again, thanks for all your responses over the last few days...great group of KNOWLEDGABLE people. I'll be on these forums alot!