But the OP said he paid Bitinstant and that the transfer from Bitinstant to the OP for the coins the OP purchased never showed up on blockchain. That has nothing to do with Silk Road or any other site - it is entirely due to Bitinstant not sending out the coins. If the OP was withdrawing from SR or talking about a transaction involving his/her SR wallet, then it would be a problem due to the current delays here. But when the transaction is coming from Bitinstant and never shows up on blockchain, that means it was never initiated in the first place.