Decided to try out if Crowd-Funding projects works for Open-Source.
Have a look at:
http://igg.me/at/eMagii/x/5581172
There is a video, showing hotplugging using Angstrom master and a patched 3.8.13 kernel.
I hotplug a mouse, a keyboard and a USB - Serial adapter in a proprietary dongle.
BR
Ulf