Does anyone here worry about the concentration of hash power? 6 of the last 7 blocks have been found by BTC Guild. This is beginning to worry me.
No. They were found by miners of that pool, not the pool itself. If the pool misbehaves (the blocks contain only transactions with high fees or the blocks contain no transactions at all etc.) these miners will switch within hours.
I wonder though why the first ASIC miners are not solo mining. Damn you can afford to do it with a block found on average within hours.
Check the ASICMINER thread. They still want to reduce variance some.
