@cldutton et. al I tested this over the weekend with the BRCK configured as a VPN client and all traffic to it (Wi-Fi and/or Ethernet) being routed via the VPN connection. There was a slight dip in Internet speeds but I could comfortably access sites and stream video; YMMV depending on the size of your Internet pipe and any throttling, rate-limiting mechanisms employed by your service provider.
We haven't firmed up the schedule for releasing this but most likely Q1 of 2016. In the meantime, I'm happy to provide assistance if you'd like to get this installed on your BRCK.