This address in turn links to many of the other addresses mentioned through a ~500 BTC transaction to https://blockchain.info/address/16V3hoVfbQmpQQpCSkAirjVHGfSFoDFSbW (to sign these tx's, FC would have to hold the private keys to all inputs), including, most notably:
I'd seen these addresses a number of times before and have mentioned them in this forum, but the tx that definitively links them is when the funds were sent from 1HtUGfbDcMzTeHWx2Dbgnhc6kYnj1Hp24i (AM's old solomining address which has been receiving the BTCGuild output) to 1ERszMSERwHNR9Xty73KZXpsg1jjBXWcHh earlier this morning.
Also, in case anyone's looking (I'm out of BTC after buying AM shares earlier in the night after the aforementioned tx) - there's an arb opp to sell MINE/SELL pairs back to twentyseventy for BDD at the 0.01051/0.0055 level.