Miners showing support so far:
Bitmain/Antpool
BitFury
BW.COM
HAOBTC.com
KnCMiner
Genesis Mining
Slush should join up on it at any time now which will bring the supporting hash rate to over 50% according to blockchain.info pool stats.
Coinbase, Bitstamp, OKCoin... Bitpay should join at any time now as well. Others will likely follow suite shortly.
Consensus is forming, brace yourselves