RepRap, a project[1] that tries to build the first self-replicating machine, is using Ubuntu for its software, and actually recommends[2] it for use by those who want to rebuild their prototypes... PS: thanks to MarkVDB for the pointer. :) [1] <http://reprap.org/bin/view/Main/WebHome> [2] <http://reprap.org/bin/view/Main/RepRapOneDarwin> -- Jan Claeys