A few more points to consider: (1) current network hash rate is closer to 18-20 GH/s than 24 GH/s, (2) the estimate of 12 GH/s was conservative and already considered that 1/3 of the chips won't work - if successful ASICMINERs hashing power could be anywhere between 12 and 18 GH/s, (3) the increase in difficulty due to ASICMINER could cause other miners to give up.
Taking those into consideration, the estimates in the posts above could even be on the conservative side.
However, this also opens up a very real possibility of a single outfit owning >50% of the network hash rate, which could cause a great deal of panic because the "51% attack" is widely misunderstood and feared. That could cause the exchange rate to tank. Would probably be a good idea to share the hashing power between a few different pools and do some self-mining, just to avoid a >50% panic in the beginning...
Again: It would not be in ASICMINERs interest to do a "51% attack". And if no one believes they actually have the best interest at heart then why would you believe BFL. maybe BFL is a secret CIA outfit setup to gain the trust of people to get as many pre-orders as possible, so they can build ASICs and do a 51% attack with the money of people that believe in Bitcoin.... would be the most ironic scam ever.... A majoritiy of miners funding the demise of Bitcoin....
Enough tin foil hat fairy tales for tonight !
ASICMINER is here to serve the interest of their shareholders and doing anything funny that cripples the value of Bitcoin is not one of them!