Open Data Licensing

I've blogged about open data in the past and some of the issues with using Creative Commons licensing for data and why OpenStreetMap was looking at a new license specifically for data. 

The first version of Open Database License (ODbL) has been released.  ODbL 1.0 is an open license for data and databases which includes explicit attribution and share-alike requirements.  The best simple description I have heard is that ODbL is Creative Commons with Share Alike (CC by SA) without the problems.

Jordan Hatcher, the author of the ODbL, just gave a presentation on the ODbL and DbCL (Database Content license) at SOTM09.