Over the past few months, I’ve played with Solaris — specifically, OpenIndiana, or OI for short. OI is a fork of OpenSolaris. OI’s first release happened on September 14, 2010. Today, exactly a year later, the OI community is proud to annouce the release of build 151a. The release notes say it all.
Personally, I find the KVM port to Illumos (the project that forked the core libs, programs, and OpenSolaris kernel) the most interesting. It’ll let me run (and manage!) virtual machines a bit more easily than what I get with VirtualBox. (Since OI now uses Illumos as the core Solaris upstream, it benefits from all the great work done by companies and individuals that contribute to Illumos.)
In case you are a bit confused, OI aims to be the defacto community Solaris distribution.
Oh, I almost forgot… 151a includes a package with Guilt (developer/versioning/guilt). :)