There have been a few releases since this article was written.

OpenIndiana version 151a_prestable5 was released a few days ago, but I have no idea how close they are to a stable version. I've been googling, but haven't found anything suggesting an immanent release of OpenIndiana. The last announcement said a stable release was due in Q42011.

http://wiki.openindiana.org/oi/oi_15...+Release+Notes