Hey Foo and company wanted to stop in and say hello. Like you UnityHQ.net is running games servers for Co-OP (one in North America and one on our new Euro dedicated datacenter box)
I've gone with the password required on the Euro servers as an experiment. You posted in another forum about running more slots. I've ran up to 12 in Co-Op so far (as my boxes are dual zeon CPU boxes on datacenter connections) hasn't been a bandwith issue at all.
If you'd like to colaborate on this etc. stop by the unityhq forum http://www.unityhq.net or email me at
of course everyone visit and let us know what maps you'd like to see on the unity servers (we are running Co-Op and DD for Nolf 2 plus Nol1 and Contract Jack servers as well) and we want to help you have the most enjoyable gaming experience you can.