Release B4

they are likely using the last few days to ensure happy B1-B3 customers. By the end of the week almost every order should be shipped and they can offer 48-hr shipping on B4 onwards.
also, they probably need a few days to redesign the miner to achieve 500GH if its possible.
500GH Would be devine. Hopefully BITMAIN can do it.
If they can't, we will do it with overvolting.
I'm still waiting for shipping or tracking informations, but once I receive my order, the first thing I'll do is overvolt and overclock, as usual.