When you get new memory cards for your camera make sure you format them first. I took about 20 photos at lunchtime and one or two were good enought to go up here, but Linux refuses to see the card, saying,
# mount /dev/sda1 /mnt/camera
/dev/sda1: Input/output error
mount: you must specify the filesystem type
Time to format the card..
Update! I’m glad I went searching first. The Digital Camera Support for UNIX page is a comprehensive listing of digital cameras that are compatible with Linux and BSD. It lists the Sony DSC-F717 there and says you can use the usb-storage device, or PTP mode to access it. You can use gphoto in PTP mode and download photos using a nice GUI!