I'm glad to see you enter the asic market, ngzhang.
I'm sure it will be a quality product. Clever move by using open wrt.
Technical questions:
How many asic chips per pcb?
Unit dimensions?
Cgminer has DD WRT support on mipsel chip. Do you foresee any problem with open wrt/chip and cgminer? (This question is better put to the miner dev's, but knowing what type of embedded chip is important)
At ~600W per unit, what heat management solution will be used?