^^^ I'm pretty sure you're not on JB then.
I still can't seem to get this to work. I'm hanging at "daemon started successfully", because when I choose XT875 it gives me the INVALIDARG, busyhost error other people are getting. I installed the extension for VirtualBox and enabled the USB 2.0 thing.
I'm Windows 8, 64-bit. It's the Surface Pro, if that makes a difference (only one USB port, 3.0)
Dallmeyer you got access to another computer? Reading all the virtualbox forums looks like usb 3.0 is not supported. I tried this for a couple hours on my Windows 8 x64 Thinkpad Twist (2 usb 3.0 ports) and then came across the information. Went to a Windows 7 x64 desktop and did it on first try.