You can see for yourself exactly what is cooking on the following website:
http://bfl.ptz.ro/There are about 60,000 units before you, and you can calculate exactly in which year your order will be shipped.
One word of advice. If you buy a miner from Butterfly Labs pay using a credit card. This way you may be able to get a refund from the credit card company if by some small chance your order does not get shipped as promised by the nice people at BFL.
I have read a lot of people saying this is a scam. But has anyone received they're miner. I was thinking about buying one. But I don't know. I see people selling they're preorders on ebay. Does anyone think it's worth purchasing?