I like your thinking, straight out-of-the-box!
I haven´t really thought about it before as I´ve sort of dismissed the USB functionality of the BCR completely for now. I had only looked at getting the USB port going as a regular USB interface during the development and it was just way too much research/work to justify the efforts (5$ USB-Midi interfaces available etc).
And even if I was able to get a handle on the USB functionality I wouldn´t know if you could ever plug in a device into the BCR, when it itself is designed to be the device-to-be-plugged-in.
Interesting topic though, I might have a read in that direction.