I'm trying to get a refund now. These are barely on the edge of ROI for me. It isn't worth burning the apartment building down for a few extra bucks. Will let you all know if I have any luck.
At the rate of difficulty increase, by December of 2014, a 70TH machine (if one will exist) would only have a shelf life of one month.
ASIC is really destroying mining. If code could be implemented to exclude ASIC it may need to be done in 2015 or sooner.
If the asics where excluded the network would be left unprotected for a 51% attack. It needs the asics to get big, what's killing mining are irrational buyers...