Looks like a good solution for the problem of naming the reference OpenSolaris distribition without alienating the developers of other Opensolaris distributions - An Open Letter to the Community: A Proposed Solution:
For the community, OpenSolaris RD is clearly delineated, drawing on the OpenSolaris brand but being distinct at the same time.
For Sun, this provides a clear, hip, conventionally accepted naming scheme that is extensible over time. Taking up the name "OpenSolaris" alone is short sited. Because of the nature of the distribution a fully supported version will need to be created for ISV Qualification, etc, down the road. This qualified version will be a customized version of OpenSolaris RD and perhaps named OpenSolaris GS ("Genric Server") or OpenSolaris DS ("Data Server").