There are converging web-related issues cropping up, like privacy and security, that we currently have no way of thinking about. Nobody has thought to look at how people and the web combine as a whole - until now.
I think IT projects are about supporting social systems - about communications between people and machines. They tend to fail due to cultural issues.
Intellectual property is an important legal and cultural issue. Society as a whole has complex issues to face here: private ownership vs. open source, and so on.
On the web the thinking of cults can spread very rapidly and suddenly a cult which was 12 people who had some deep personal issues suddenly find a formula which is very believable.
We shouldn't build a technology to colour, or grey out, what people say. The media in general is balanced, although there are a lot of issues to be addressed that the media rightly pick up on.
One of the issues of social networking silos is that they have the data and I don't.