just wondering.. coz the Panasonic 256mb 10Mbps Secure Digital cards cost about $30 more compared to the normal ones. thats quite a bit actually.

so i have a few questions:
1) is the 10mbps for reading, writing or both?
2) whats the speed of the NORMAL sd cards? (are reading and writing speeds different?)
3) how much of the 10mbps does the camera utilise? is the camera capable of reading/writing to the card at 10mbps?
4) how much difference would i see if i was capturing perhaps 500kb pictures. or 1mb pictures?

my apologies if this question has been asked before.

thanks in advance.