1. In a network intermediary, a server-based method for interconnecting multiple IP Multimedia Subsystem (IMS) networks, the server-based method comprising: receiving incoming traffic from a source IMS network; processing aspects of the incoming traffic including at least (a) retrieving at least a portion of the incoming traffic from a first queue, (b) performing a routing operation using at least aspects of the incoming traffic to identify a destination IMS network, (c) generating one or more transaction detail records based on the routing operation, and (d) depositing at least a portion of the incoming traffic on a second queue; and sending, from the second queue, aspects of the source traffic to the destination IMS network.