my impression is its back burner for now because Norco hasn't been able to find a hardware partner to produce an expander PCB for them. they seemed to prefer the idea of a PCIe card approach - like the HP SAS Expander - so they could sell it standalone. I suggested they consider designing a backplane with an integrated expander chip since they could set their cases apart from the competition rather than trying to sell low-margin standalone expanders. i'd definitely pay a premium for a case with integrated expander over the sum cost of both parts standalone. and less cable clutter.
Thanks Odditory. Excuse the laziness (The HP exapnder thread is huge) but was a neat little pcb to do power control and secure the HP expander in the Norco cases ever found. I think I'm at least a year off needing more bays but putting together my rack over the weekend just made me think about the future.