TartuThe second morning at CATaC 2006 begins with a session I'm chairing, and my own paper is also in this session - so I'll try to blog the other three papers, and to post the slides and text for mine. Chris Newlon and Anthony Faiola are the first presenters, on mega-collaboration. They begin with a focus on Hurricane Katrina, which they describe as exhibiting a pattern of success and failure. The response to the hurricane was a spontaneous gathering and coordination of information resources by private-sector ICT organisations and individuals, but the government failed to effectively make use of this wealth of information. Of course, planning is usually for the expected, but not for the worst imaginable extreme - how, then, to plan for the unexpected? Chaos was the only response in the Katrina case, especially also because of cultural barriers between the different agencies and entities involved in the flood response. At the same time, the use of private ICT resources can be described as a success - socially connected information networks were in clear evidence here, including privately run missing persons databases, as well as blogs, lists, bulletin boards, etc. This builds on a small world principle where most individuals are connected, but where such connection depends on contextual information which points towards the most useful contacts to utilise.