I have received a few slides from presenters at Xen Summit and have posted them at SlideShare in the Xen Summit at AMD 2010 event page. You can access the slides at http://www.slideshare.net/event/xen-summit-na-at-amd-2010.
I will continue to upload the slides on SlideShare as I receive them and will also add a new page to the Xen.org Events Web Page for this event shortly.