ONNV build 143 is a important for every one of us that uses lx Branded Zones - the Linux ones. There have been a stall in development since some time and forums are full of people looking for ways to install anything newer than CentOS images provided by the project. But since the build 143 Linux Brandz will be removed. If you you is too, like me, you have to plan for some migration.
And so Linux Brandz go away: http://static.opensolaris.org/on/flagdays/pages/20100612010403.html