Mailing the story:
Install Solaris (Nevada build 87) DomU at Ubuntu 8.04 Xen 3.2 Server Dom0 (amd64)
Install Ubuntu 8.04 Xen Server (amd64) as was recently advised by Todd Deshane in his notes @LiveJournal.com. To configure startup profile for Solaris Nevada build 87 at Ubuntu 8.04 Server Dom0 perform losetup of ISO image of Solaris DVD and change disk entry ....