They (bertrik) coded a way to extract firmware from a SB file, giving
the key. Looks like on Sansa Fuse+ the key are all 0000, the same as
imx233 from factory.
The tool is on rockbox_svn/utils/sbinfo
So, since there are others wanting to port Rockbxo for imx233, I guess
we will see a speed up on our port :-)
--
Cumprimentos,
Jorge Pinto