With two clusters on the larger unit, it will conservatively produce 72GH/s. Yes, this is very good news - a 33% increase in hashing power! Yes, this means the 27G unit now becomes a 36G unit.
From
https://www.btcfpga.com/forum/Those ordering from Tom are happy!-)
But most likely this will add 3 extra weeks to deliver. One week redesigning board layout to accommodate more chips (this includes power circuit redesign), one week (they said 8 days) to produce pcb, one week to assemble everything.
PS: I'm a customer.