Compass version 2.1.0 M1 released. The release includes several features including a much improved XSEM support (namespace xpath, better stax integration, jdom integration), Dynamic mappings removal and additions, JSEM – JSON to Search Engine Mapping support, and Collocated integration and distributed search with GigaSpaces. It also includes several bug fixes (with the important ones backported to 2.0 branch). Enjoy!.