Also very necessary once all those 600 Ghash/sec miners come online in the next 30-60 days. The difficulty will go through the roof.
I wonder what it costs to build a 10 chip board. Single chip 2.5Mhash/sec bitfury chip board originally cost $100
KnCMiner is the only competitor who has 28nm chips, but their chips are merely 1000 Mhash/Joule, which is a power efficiency pretty close to Avalon gen2: 730 Mhash/Joule.
This would be a really easy board to manufacture. Low unique part count. I just need to move the decoupling cap vias out of pad and it'll be ready.