Just returned from DTW from HNL (via MSP) on the DC-10. I can confirm it is the WBC configuration. While we were boarding in HNL, the gate agent announced that anyone could purchase a remaining FC seat available for $350.

Quick little side comment. It's been discussed before, I think it's stupid that NW doesn't show a full assortment of IFE (movies) on the Mainland - HNL flights. The tapes are on board, the equipment is on board. Why not? It's a long flight from DTW/MSP - HNL.