@Luke-Jr I can't get my USB block erupters to work on bfgminer.
I run Gentoo & they never show up in /dev/ttyUSB0 the way you keep saying it does, I have done everything I can think of & than some.
Well, there's something broken with your install, because they should appear as /dev/ttyUSB* - they do on any Linux/linux-based OS I've seen, even on OpenWRT.
Do you have the VCP drivers installed?