Whoever thought that OpenSolaris was dead after the Oracle acquisition, might be wrong : OpenSolaris 2010.05 has been released with some important new features :

• ZFS deduplication : I've always predicted that this would once become a default feature of file systems, and ZFS is the first to implement this


• IPS : the new Image Packaging System : the reworked package manager for OpenSolaris, a big deal in bringing the legacy Solaris package management to a higher level


• USB support for VirtualBox guests


• Gnome 2.28

Update : seems that this was a link to a draft document.