haha that site is gold.
BH Miner USB Bitcoin
No. of chips: Minion ASIC chips SHA26,
Hashrate: ~100GH/s out of the box, up to 120GH/s overclocked,
Power usage: ~0.75W per GH,
Dimentions: 28x60mm without usb plug,
Voltage: 5V
Power requirement: 2-2.5A
Supported software: cgminer
(100gh)(0.75w/gh) = 75W
(75W)/(5V) = 15A
not sure how you pull 15A over a usb port, since that's 6X the advertised power usage. The 14 reviews of it being a good, fast-delivered product (and stating it does 100GH+) is the icing on the scam-cake
heres a 1200MH scrypt miner that looks a lot like a fancy ATX pc
http://aryadutaminer.com/buy-the-blessinghash-leopard-1200mhs-scrypt-miner-online.html