The OpenSolaris project, which has been slowly gaining momentum over the past year, issued its first official release last week. Designed with an emphasis on usability and easy installation, OpenSolaris aims to provide a complete desktop platform for users and developers built on top of Sun's Solaris kernel. We have been testing OpenSolaris 2008.05 in order to see how it compares to modern Linux distributions like Ubuntu, Fedora, and OpenSUSE.