The 3.4 release marks the first release of OpenOffice under the auspices of the Apache Software Foundation, where the OpenOffice project is still classified as an incubator project. Within the ASF, all new-to-the-Foundation projects have this status, as their coding, licensing, and governance practices are shifted to the ASF’s standards.
There was some speculation amongst the punditry that with the first new release of Apache OpenOffice the podling project would be “upgraded” to full project status, but that did not happen. It might be tempting to speculate as to why this might be the case, but I am personally not reading anything into this: goodness knows the OpenOffice developers and community has enough on their plates getting OpenOffice updated and in compliance with the ASF.