This camera is reported to work 'out of the box' at:
http://www.qbik.ch/usb/devices/showdev.php?id=2000
so I suspect something wrong with your kernel/usb setup. If I plug in a CF card reader, dmesg tells me it is SCSI device /dev/sdb (kernel 2.6.3). I can't remember if older kernels give this information. Try mounting /dev/sda1 or /dev/sdb1. You don't need to create any devices. Here is everything in my kernel config file matching USB or SCSI (minus a few irrelevant bits). Also some of this is for a SATA disk.
CONFIG_BLK_DEV_IDESCSI=y
CONFIG_SCSI=y
CONFIG_SCSI_PROC_FS=y
CONFIG_SCSI_REPORT_LUNS=y
CONFIG_SCSI_SATA=y
CONFIG_SCSI_ATA_PIIX=y
CONFIG_SCSI_IZIP_EPP16=y
CONFIG_SCSI_QLA2XXX=y
CONFIG_USB=y
CONFIG_USB_DEVICEFS=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_UHCI_HCD=y
CONFIG_USB_PRINTER=y
CONFIG_USB_STORAGE=y
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_DPCM=y
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
CONFIG_USB_HID=y
CONFIG_USB_HIDINPUT=y
CONFIG_USB_HIDDEV=y
CONFIG_USB_SERIAL_GENERIC=y
CONFIG_USB_EZUSB=y