i just got a 5d2 and my cache of 4gb CF cards that gave me such awesome capacity with my 10D now feels incredibly limiting. if i try to use a 1- or 2gb card, its like using film; 25-50 images and i have to switch. I know using an SD-compactflash adapter slows down write time, and i cant burst raw images, but is it fast enough to shoot video if i use a class-10 SD card? i'm planning on getting some good size CF cards fairly soon, but SD card prices have them looking very attractive if they will work for video.

