Out of the blue Halong Mining have just announced a new ASIc miner called DragonMint B29 designed for the Blake256 algorithm supporting Decred (and other Blake256 coins?). The new ASIC should be capable of delivering 2.1 THS Blake256 hashrate with just 900 Watt power consumption. The not so great thing about this new miner however is the price of $10499 USD, even with included power supply and free shipping it is pretty expensive. The DragonMint B29 Blake256 ASIC miners should start shipping March 22-30 according to the official website if you order now while there is stock. There is an official link to a Decred pool with one of the ASIC devices mining on it posted by Halong Mining on Twitter, so you can check some stats here.
