I have updated the Xen.org community slides based on the newly announced Cloud Xen project and the new format of the website. The slides are available in pdf:
Xen Overview PDF
Xen Overview Q3 2009
View more documents from Stephen Spector.
If you would like the slide source for your own leverage, please let me know and I can email them to you as the deck is larger than 2M and WordPress will not let me upload them.