I've tried to load Lenny via your instructions Jeff and have the following issue:
CE>> run bootcmd_usb
NAND read: device 0 offset 0x2500000, size 0x80000
Reading data from 0x257f800 -- 100% complete.
524288 bytes read: OK
## Starting application at 0x00C00000 ...
And that's where it stops.
Every second power cycle boots into the 'normal' boot via nand - I gather this is a design feature.
The goflex net has only one usb port - could this be the issue? Hardware wise the big difference seems to be two sata ports and one usb, the ram/nand size seems to be the same.