The OpenSolaris 2008.11 OS is a point of integration for the installation, desktop, and package management system projects on OpenSolaris.org.
Today, the OpenSolaris 2008.11 LiveCD is available with the following feature updates:
» ZFS Time Slider and Songbird
» Suspend/Resume and CPU power management
» Distribution Constructor and Prototype Automated Installer
» WebStack with 64-bit MySQL, CherryPy, and DTrace for Ruby
» GNOME 2.24, OpenOffice 3.0, and Firefox 3
» Many F/OSS apps added, including top, sudo and emacs
» 700 additional man pages and Package Manager online help
I just came out today, I was waiting for it I'm downloading it at the moment, one of the coolest improvement they've made seems to be the ZFS Time Slider, which is some kind of file recovery. It automatically backups files from directories you want and lets you go back in time to recover lost files / previous versions of files.
I remember some people had trouble installing 2008.05, so maybe 2008.11 will work for you.