My stuff isn't exactly "mass production" on the scale of Block Erupters and U1/U2, but my stick miners will run about as cold as you want them to. The 2Pac will get about 8GH at stock USB power if you set it to baseline voltage and 75MHz.
The reason there are no mass-produced stickminers at all right now is because the industry doesn't care about anyone except themselves and high-dollar commercial customers. That's why the only miners made in the last two years are >1KW 80db monstrosities requiring industrial power and exhaust. Why should they focus efforts into a $30 miner and get a thousand annoying customers to wrangle when they can make a $2k miner and sell a thousand to one guy?
I don't know how much demand there is but I wonder if you could sell 10,000 100GH usb miners if there was such a thing? Must be economics preventing the manufacture of this product.
