For those of you curious about the Xen Document project, you can see the latest at http://wiki.xensource.com/xenwiki/Xen3.xDocumentUpdateProject. All documentation requests are posted on the site along with people who are working on the updates and status of those changes. Please contact me if you have any questions.
As an update on the Xen 3.3 User Guide, I have a new version posted with all the cosmetic changes complete. The next set of changes are requested on the Wiki page.