I just wanted to say that having one portal is not absolutely necessary, because if the metadata from these content sources are published to a particular standard, it's very easy for centralized places to find that information.
With regard to privacy of information, there are absolutely clear lines, and there are grey areas where information should not be released. As Tracey has been pointing out, aggregated data are the safest kind of data to release, but even then, if you have a very small population centre and it could only be one or two people they're talking about, there's still a danger. However, this is the kind of problem that can be resolved, and we're moving forward on lots of large data sets that can be easily released.
It's going to be a big project and it's going to take a long time to release all the finest levels of data, but I think there's quite a lot of information that can be released today with....