A beginners guide to understanding OpenStack

http://opensource.com/business/14/2/openstack-beginners-guide
入門動画(英語)いろいろ。どれも長い...
Introduction to OpenStack with Sandy Walsh from Rackspace

Overview of OpenStack and the OpenStack Foundation with Mark Collier

OpenStack 101 with Joshua McKenty from Piston Cloud Computing

OpenStack Basics with Brian Gracely from Cisco

OpenStack Architecture with Russell Bryant from Red Hat