The use of ConferenceXP for this is one possibility. David Mycue has a server up and running. It may not be a long term solution since it is a Microsoft experiment and isn't slated to be product.
David is also bringing up a Cisco MeetingPlace server for evaluation.
Steve started a list of criteria for collaboration services.
Cisco is also interested in doing a case study involving SMA - though that may be dependent on our using the Cisco product.