Bitcoin Mining Distribution Block: 159451 28 Dec 2011 Hashrate (in Difficulty units per second; 1 Difficulty unit == 4 GiHash): Total Chain 100.00% 1,938 Unknown 80.00% 1,550 BTC Guild 10.34% 200 Eligius 4.14% 80 Yourbtc.net 2.76% 53 BitMinter 1.38% 26 NMCbit 0.69% 13 simplecoin.us 0.69% 13