mitty,

Thank you for the estimates on the delivery. I looked into the difficulty increase at 30% and it chances of recovering money for a 600 GHs card look very dim, so I'll consider this 50GHs rig a loss and move on, rather than throw more cash at the problem and watch it burn. And yes, they still take the 10% transfer fee, to move you from one product queue to another.

I was looking a few other vendors who are promising deliveries of 400 GHs rigs in Oct & Nov, and some people have ordered 20 rigs! In the near future, those running the network will be filthy rich people and/or organizations, which makes me feel uneasy. What if governments decided to kill Bitcoin by simply driving up the difficulty, then when it's too high for anyone to buy a rig and run it at home, they shutdown their systems. This will ultimately all transactions unverifiable and Bitcoin dies!