ButterFly Labs SCAM OR NOT???

[Blisk]

I have also sended email to them to see about date when units can be availible, but no answer. I have a feeling of scam, why I don't know I hope not, because I like to buy one of those units. But when BTC reach 21 milions than we can use this unit just for plant stander....
Like someone said before, how can some device manage so much Ghash?
With special chips? why they don't use it in video cards?