~snip~
Following-up here to say it was indeed permissions issue. When I used sudo to list USB devices and start cgminer, all works well.
Thanks for troubleshooting with me on this. Got all 3 humming along at 400+ now
Good to hear it's working now.
Hopefully you managed to make it work without sudo, as there's really no need to run cgminer as sudo and it's always preferable to run any software with as low permissions as possible.
For example, if any malware somehow gets into cgminer, then it would have full access to your entire computer, whereas if you're running it without sudo there will be some actions it cannot do at least.