After installing kmod-usb-audio and kmod-usb-ohci, I get the following output on reboot....
usb-ohci.c: USB OHCI at membase 0xb8003000, IRQ 6
usb-ohci.c: usb-00:03.0, PCI device 14e4:471a
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
hub.c: new USB device 00:03.0-1, assigned address 2
usb.c: USB device 2 (vend/prod 0x1130/0xf211) is not claimed by any active driver
I've just noticed that this is different than the output you got! My audio usb adaptor also has a microphone line in connection. Perhaps this explains the '2 ports detected'? Worst case I can just buy an adaptor that works but it would cool to get this one going!