Aren't those drobo's just hard drive enclosures?
If it's thunderbolt attached then there's no need for a driver since it's just an extension of the exsisiting PCie bus, however what you may need a driver for is the raid device/drive controller.
So you would need to find out what storage controller it's using to control the drives. You'd also need access to the controller driver's source code. If you can get that information, then I will look in to driver development.
I personally don't see any of that information. Without the source code, it will never happen. And even if you get all that, you will have to purchase one to develop a driver with, since there will be debugging to perform.
Let me know and I'll see what I can do about getting people and resources together to move a project forward.
That's what it means to be a community, helping one another.
History and experince have told me, you most likey won't find third party driver help here. You should really register and post your request at http://www.vm-help.com/forum
Great community there, with people ready and willing to help.
Hope this helps....