it sounds as if they need to go to the SCSI target code and implement a OSD mode for it that then stores the files on a 'normal' local filesystem.
this would let any linux box with the appropriate interface act as a OSD device, allowing for solid experimentation on both sides of the interface.
putting the filesystem layout code on the storage device raises a _lot_ of questions about reliability and performance. it also prevents trying different layouts.
it will also make it very hard for RAID to be used on such devices.
I really don't expect this to be the wave of the future, but anything can happen.