Looks like 2 months of 24x7 mining to break even with $0/kWh.
Mehhhhhhhhhhhhhh.... and that's assuming a fairly high price of $135/btc.
Litecoin calculations are faring a bit better, but still a tough sell for me right now. We'll see how the plan for free power goes down...
I just bought into this with 2 7950s for about 450 and a third I picked up for 40 that my or may not need an RMA. The way I have it figured is I'll pay for the rig in 2 months if 3 cards work.. 3 without... and if it doesnt work out... then I'll still have about 500$ worth of cards so its really no harm in trying.
I'm thinking I'm gonna do litecoin though, seems to be a bit more money it in for what I have.