The new ALGOR from E3B (makers of the Highway and Subway) has a flash ROM into which Poseidon (the USB stack) and its class drivers can be installed. This means it can boot from USB massstorage devices. E3B also have a boot ROM add on for the Highway called the ROMulus planned giving it the same capability.
According to the
E3B website both these boards are currently in production.
To my knowledge the Thylacine does not have a USB massstorage driver unless you use Poseidon rather than its native USB stack. And you're quite right that it does not have a boot ROM.
Robert
