I was recently told that one of the nice features of 6.1 is that a subscriber node could be place accross a WAN link. I have a two node cluster right now. I'm thinking about adding a third in a backup data center. I would create two CallManager groups and have the both subcribers is each group but is reverse order. Then assign all the remote phones to the remote group and the local phones to the local group. Does this make sense?