AT91RM9200 booting from USB problems

Hi all!
I've gotten my board to boot! Thank you to all who have responded and
helped me before. I have a USB key hooked to the host port, and I can see
the USB driver detects it.. but oddly enough it seems to try and add it a
couple of times... which is perhaps breaking it? and is /dev/sda the
correct entry for root= when booting from a USB key?
Thank you for any help!

Linux version 2.6.14 (roboman@gooseProduction) (gcc version 3.4.5) #22 Tue
May 30 23:48:17 EDT 2006
CPU: ARM920T [41129200] revision 0 (ARMv4T)
Machine: Atmel AT91RM9200-DK
Memory policy: ECC disabled, Data cache buffered
Clocks: CPU 179 MHz, master 59 MHz, main 18.432 MHz
CPU0: D VIVT write-back cache
CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
CPU0: D cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
Built 1 zonelists
Kernel command line: console=ttyS0,115200n8 mem=16M@0x20000000
root=/dev/sda rw noinitrd
PID hash table entries: 128 (order: 7, 2048 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
Memory: 16MB = 16MB total
Memory: 14648KB available (1160K code, 282K data, 72K init)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
Linux NoNET1.0 for Linux 2.6
SCSI subsystem initialized
usbcore: registered new driver usbfs
usbcore: registered new driver hub
NetWinder Floating Point Emulator V0.97 (double precision)
AT91 SPI driver loaded
AT91 Watchdog Timer enabled (5 seconds)
ttyS0 at MMIO 0xfefff200 (irq = 1) is a AT91_SERIAL
ttyS1 at MMIO 0xfefc4000 (irq = 7) is a AT91_SERIAL
io scheduler noop registered
io scheduler anticipatory registered
RAMDISK driver initialized: 1 RAM disks of 14000K size 1024 blocksize
loop: loaded (max 8 devices)
usbcore: registered new driver ub
at91rm9200-ohci at91rm9200-ohci: AT91RM9200 OHCI
at91rm9200-ohci at91rm9200-ohci: new USB bus registered, assigned bus
number 1
at91rm9200-ohci at91rm9200-ohci: irq 23, io mem 0x00300000
usb usb1: Product: AT91RM9200 OHCI
usb usb1: Manufacturer: Linux 2.6.14 ohci_hcd
usb usb1: SerialNumber: at91rm9200
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
Initializing USB Mass Storage driver...
usb 1-1: new full speed USB device using at91rm9200-ohci and address 2
usb 1-1: Product: Cruzer Mini
usb 1-1: Manufacturer: SanDisk Corporation
usb 1-1: SerialNumber: 000043665
ub(1.2): GetMaxLUN returned 0, using 1 LUNs
 uba: uba1
usb 1-2: new low speed USB device using at91rm9200-ohci and address 3
usb 1-2: device descriptor read/64, error -110
usb 1-2: device descriptor read/64, error -110
usb 1-2: new low speed USB device using at91rm9200-ohci and address 4
usb 1-2: device descriptor read/64, error -110
usb 1-2: device descriptor read/64, error -110
usb 1-2: new low speed USB device using at91rm9200-ohci and address 5
usb 1-2: device not accepting address 5, error -110
usb 1-2: new low speed USB device using at91rm9200-ohci and address 6
usb 1-2: device not accepting address 6, error -110
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
mice: PS/2 mouse device common for all mice
i2c /dev entries driver
Found AT91 i2c
VFS: Cannot open root device "sda" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)