A to Mallard: It s really strange! I bought a mmc rs that fits the SD slot in my Casio 7 Mpix camera (res somth close to 3400x2500) and I m able to slideshow all the photo on the 770 screen that is larger and more confortablle than the 2" Casio screen. The 770 takes betw 2-4 seconds to resize and display the photo (4-5 Mb) but it is good enough to preview the photo away from home. I've updated the system to the new realese.
beaulieu: For the cards not exactly mmc shaped I use a Lexar trio card reader (15$ including a 128Mb card), it is the size of a usb memkey and allows me to read the SD, mmc and memory stick as well. I carry it always with me, sometimes my friends like to view their photos on a larger screen than the Sony inc provide...