We've just tagged the osgEarth 1.1 release. Changes in this release include:
*Enhanced WCS driver with support for ArcGIS Server
*Added GDAL dependency to osgEarth to support new SpatialReference classes
*Added new GeoExtent class
*Added a memory cache to TileSources to increase performance when performing compositing
*Added ability to use Mercator data in a geodetic globe.
*All geocentric globes now use a global-geodetic profile now that osgEarth can mix Mercator and Geodetic imagery.
*Added ElevationManager class to provide support for multiple heightfield sources
*Bug fixes and performance enhancements