From the announcement: "The new milestone is an iterative advance, with a number of new features and improvements. It is also the last release before 2.0, which is rapidly becoming feature complete and should move in to alpha releases soon. This 1.2 release adds a number of new features such as:
A quick reminder: "GeoNode is a platform for the management and publication of geospatial data. It brings together mature and stable open-source software projects under a consistent and easy-to-use interface allowing users, with little training, to quickly and easily share data and create interactive maps."