One set of 100,000 was broken into a 60k BTC branch and a 40 BTC branch:
https://blockchain.info/address/1Hcs1e7iaMp1gvm5mypZsqVa6ncpcfiCcm
The 40k Branch, first spinoff:
https://blockchain.info/address/1K7KkP3mCsZUEDT7MuQqDpUgLgUbeLzLCA
Second spinoff:
https://blockchain.info/address/18Hs8cqQXkz8r2yBMLyFgYdCf7oj343w7B
Third:
https://blockchain.info/address/1DASVnie9amHLM7vgiiLTxYEefzx63XTmV
Fourth:
https://blockchain.info/address/192AgengM4FGGuDV8g6giFMWXhrzeGqTXr
Get the idea yet?
Now, move coin into Silk Road and immediately back out. Then look at where your "payment" comes from, go up and down the chain three or four links to get the idea of what is paying you. It's the same payout mechanism, it just rolls around and spits out money. If you bother to take the time to go through the blockchain you'll be able to confirm this is likely Silk Road's money. Some of it coalesces back into large wallets again, some of it does not. It's a great free mixing service, if that's what you truly want out of Silk Road. Given their clientele, I assume that service is necessary, but not what they are coming there for.
It may well end up being that -- just like its cash counterpart having traces of coke-- nearly every Bitcoin will someday have traces back to a Silk Road address. I'm not sure every Bitcoiner will care, but you ought to know this for the implications it may have in the future..
The link with the corresponding dendogram