I see a lot of rigs with multiple Block Erupters, and tons of USB hubs. Well I have 2 Block Erupters that I picked up for fooling around and testing CraPE with, but I doubt I'll ever mine what they cost back and make a positive ROI. I really think people throw that term "ROI" around without even knowing what it means, but that's another topic for another matter.

Anyways, here's my 90GH/s. It would take over 250 Block Erupters to get the same speed, and these 2 use less than 400W combined! I got another 60GH/s coming soon, and another 60GH/s that was a later order.