One of the new problems I'm seeing is that they didn't tell us the cards don't last forever. You will either wear it out or it will fail. I've seen people lose a month of camera use becuase they have one and only one card and it's failed.
http://www.clarity.net/~adam/recoverpix.html is very geeky but lists known picture recovery methods.
Did you try to format the card?
Bob
Canon A40. Memory cards: Lexar.
Problem: cannot load images from camera to hard drive via card reader.
Can load direct from camera.
Pref is checked to use card reader when trying to load from reader. Reader is also Lexar. Cannot get any answeres from Lexar via e-mail.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic