Although am too late to blog about it still its better than not doing it.
We at csscorp been working on the various release of Openstack for over a year. In continuation with our effort we have recently released Precise/Essex (12.04 ubuntu) version of our book.
I am happy to be part of such awesome team and its been great learning experience.
Change notes and book can be found for download here
Apart from that the same content can be found at official openstack documentation repository here http://docs.openstack.org/essex/openstack-compute/starter/content/
I also did a small screen cast for Dashboard walk through which can be found here http://www.youtube.com/watch?v=Uu3TNAlX7vs&feature=plcp