Dale Olds recently wrote in his blog about the need for an Identity Bus, describing it as "[...] a system that allows for loose coupling between identity data publishers and consumers in sequence where there is no single point of administrative control. It’s a way of passing identity data between a number of control points. It is explicitly about moving beyond hub tools like meta/virtual/directories."
Sampo Kellomäki added: "In removing political single point of control, concern arises regarding the privacy consequences and mitigation needed to make such a bus approach tenable. The panel will debate the tradeoff of loss of control versus benefits of the larger ecosystem and what can be done to minimize the collateral damage."