Are there any reliable Bitcoin ASIC providers at the moment? Butterfly Labs is shipping units now, but it's all in a trickle. Also, the difficulty rate is going to go way up once those machines come online.<p>Seems like if you bought the FPGA miners at the right moment, you earned massive ROI, but that now the market's too mature and mining profits are in a race to zero. If bitcoin sticks around, mining is destined to become a large-scale low margin business, with companies with investing large amounts of CapEx into massive farms of specialized hardware, thus squeezing out the remaining profit through scale.