When I learned the news here, I was very disappointed with this move of Sun. This is the edition of OpenSolaris that comes out bi-weekly with bleeding edge packages and more bug fixes. It will evidently be dropped during sometime in October.
I was using the bi-weekly builds for my web development and maintenance, and also for ZFS testbed. It is very sad to say goodbye to this wonderful edition and thanks to the Sun and the community for the all work that has been done up until now.
One of the things I noticed at the forum thread was that more support will be provided for OpenSolaris 2009.06 and its follow ups. This is at least some good news for OpenSolaris users because more resources will be available for the development. In the mean time, I am going to be making the transition to 2009.06 soon.