Are there any chances that some other manufacturer will release an usable cover?
I'm already thinking of doing it myself with leather + glue + velcro
it is sad that iRex didn't think well about cover when making the device, compare this two 1mm deep holes on DR800 with a large cover connector on PRS500's back; also i doubt there was any technical reasons for not to embed some iron/magnetic stuff on the edge of the case so that covers with magnetic locks would work (again, compare it to PRS500)...