What is Non-commercial Creative Commons

A report 'Defining “Noncommercial” A Study of How the Online Population Understands “Noncommercial Use”' (by Netpop Research, LLC, September 2009) looks at what is "non-commercial" for creative commons licences. One interesting aspect of this report is that it has a "CC0" licence, which waives all rights to the data. Such a licence is unlikely to be used in Australia, due to differences in copyright law.