Personally I think the name is clever with its implied connotation, but why petty fuss about it? Illumos is merely the name of the forked codebase of the OpenSolaris ON consolidation (operating environment). The name, too, extends to the community comprising of the project. There are no current plans to ever make Illumos a binary OS, much like the relation to the GNU/Linux kernel. Just as there are of number of operating system distributions build on the OSOL codebase, confusingly including one called OpenSolaris, active OSOL-based distributions and new OSs alike can be built off Illumos, the forked, completely open source, non-Oracle-dependent, OpenSolaris-sustaining operating environment.