I was pleased to be an invited speaker at the french conference on OpenSource and Cloud Computing organized by Telecom Valley.
Along great presentations from fellows from Google, IBM and Orange, I did a 30,000 feet overview of the open source solutions for Infrastructure as a Service (IaaS) Security.
What I found very useful was the feedback from entreprises using Openstack and Cloudstack (sorry, no Eucalyptus yesterday) in production. It looks like finally Open Source is getting ready for prime time on private (and public) clouds.
The slides are in french and available here. Mine and the other presentations should be available soon on the Telecom Valley.