BFL has always talked about gearing up for thousands of units a month. Were they to succeed, they could drop +100TH/s on the network per month. That would obviously be a big, big deal. I'm not holding my breath for it... I doubt they'll ship anything this month, perhaps a few hundred in May just to put themselves on the map.
Good luck to them........
People will only buy if they can get ROI and if you are selling a unit at 1.5k but the ROI is 4 years , then it's really going to dent their sale figures.
more likely they will do what josh is doing... set up a mining company