Side note: I missed part of the talk because I had to leave early to go to mass.
OpenStack turns a pile of hardware into a cloud.
Swift is their object storage system.
Nova is their system for provisioning virtual machines.
Glance is their system for image storage.
Burrow is their distributed message system.
Dash is a Django user interface for managing virtual machines.
NASA uses OpenStack.
Rackspace is going to use it. They were acquired by Rackspace.