USB MSD mass storage device example?

We are very interested in using the new USB Luminarys - but would like to our device to be a USB Mass Storage Device when plugged into a PC and show up as a hard drive - allowing files to be easily transferred to/from the uSD card.

We managed to get this more or less working for an AT91SAM7S256 design - following this example:
http://www.mictronics.de/?page=arm_examples

The Luminary DriverLib only seems to have examples of USB host functionality for connecting a USB drive to the Luminary board - but not the other way around, as a USB device.

This really would be useful - as it can connect to various hosts: PC, Mac, Linux without requiring any USB drivers.

Has anyone implemented this yet? Is Luminary planning to provide an example of this with their DriverLib?

And ideally - we'd like to be able to bootload new firmware by simply putting a .bin file on the uSD card via the USB MSD and having the device update itself when it sees a new .bin file.



Thanks

Glenn