I don't think that the 1700/1900 loop comfort station has been closed lately. The one that has been closed for the past few weeks is the one between 1600 and 1800. It was still closed on 5/10/09, with a lot of construction material sitting outside. I would say another couple of weeks? I'll bet it will be open by Memorial Day.
Once the 1600/1800 comfort station reopens, the 1700/1900 comfort station will be the last old style comfort station.