I've tried to set this up as described in http://blog.fredrikhaglund.se/blog/2009/09/22/episerver-cms-how-to-configure-remote-events-with-many-servers-and-firewalls-between-them/ and although the site works as expected in different locations I'm not getting updates made on one site on any of the others.

I have this set up in web.config as follows on four servers

    <system.serviceModel>
      <services>
        <service name="SiteID/EPiServer.Events.Remote.EventReplication" behaviorConfiguration="DebugServiceBehaviour">
          <endpoint name="RemoteEventServiceEndPoint" contract="EPiServer.Events.ServiceModel.IEventReplication" bindingConfiguration="RemoteEventsBinding" address="net.tcp://localhost:13000/RemoteEventService" binding="netTcpBinding" />
        </service>
      </services>

      <client>
        <endpoint name="SiteID-Server1IPAddress"
            contract="EPiServer.Events.ServiceModel.IEventReplication"
            bindingConfiguration="RemoteEventsBinding"
            address="net.tcp://Server1IPAddress:13000/RemoteEventService" binding="netTcpBinding" />
        <endpoint name="SiteID-Server2IPAddress"
            contract="EPiServer.Events.ServiceModel.IEventReplication"
            bindingConfiguration="RemoteEventsBinding"
            address="net.tcp://Server2IPAddress:13000/RemoteEventService" binding="netTcpBinding" />
        <endpoint name="SiteID-Server3IPAddress"
            contract="EPiServer.Events.ServiceModel.IEventReplication"
            bindingConfiguration="RemoteEventsBinding"
            address="net.tcp://Server3IPAddress:13000/RemoteEventService" binding="netTcpBinding" />
        <endpoint name="SiteID-Server4IPAddress"
            contract="EPiServer.Events.ServiceModel.IEventReplication"
            bindingConfiguration="RemoteEventsBinding"
            address="net.tcp://Server4IPAddress:13000/RemoteEventService" binding="netTcpBinding" />
      </client>

      <behaviors>
        <serviceBehaviors>
          <behavior name="DebugServiceBehaviour">
            <serviceDebug includeExceptionDetailInFaults="true" />
          </behavior>
        </serviceBehaviors>
      </behaviors>

      <bindings>
        <netTcpBinding>
          <binding name="RemoteEventsBinding">
            <security mode="None" />
          </binding>
        </netTcpBinding>
      </bindings>
    </system.serviceModel>

Note that I only have one entry for services/service as there is only one site but on multiple servers.

Is there anything obviously wrong? Do I need to set up address="net.tcp://localhost:13000/RemoteEventService" on all of the servers (if so how?)?

Any suggestions greatly appreciated,

Mark

did you find a solution already... or see this blog?
http://andersnordby.wordpress.com/2012/12/18/episerver-remote-events-cms-6-r2/