Set up Sun xVM 3.4.2 on top of opensolaris 1002-128a via binary packages been built by Pascal Gienger at Index of /software/xvm/3.4.2. Been performing testing bellow my major concern was ability Sun xVM 3.4.2 to handle PV DomUs with boot file systems of ext4fs type. Actually, two guests have been tested : F12 and Ubuntu Karmic Server, in both cases boot partition has been converted to ext3fs to create DomUs manageable via virsh ( virt-manager).