I imagine that most will do this,
No, I pay for a VPN through IBVPN. I recently learnt that the VPN client can be enabled on some routers meaning that I can run my vpn downstream of all my computers, rather than just the one.
Looking at the routers available on overclockers, for example, I imagine that most will do this, but I am not sure what to look for in the specifications to be sure.
Hope that makes sense.