Rob and Norman have pointed out the boundaries of the web and the formats are slightly orthogonal. We might have work that we can do together. Each industry has it's own institution for trust. If someone builds the framework and mechanism by which the process of trust can be enabled, then those industries can use their existing trusted institutions. It's a process of building a new technology.
Members are who are cross industry and major tech vendors.
See trustedpc.org . It's a starting point for us, in terms of managing trust.