I used this one:
http://www.newegg.com/Product/Produc...82E16820163159
It's a Transcend 4GB 150x (TS4GSD150)
Problem is none of my card readers will read this card.
My Treo and Canon SD800IS read it fine though. Does anyone know of a card reader that will read it? I think it's slow when transferring from device to PC.