"The server editions include many components that poise Ubuntu
Server towards cloud environments, largely blurring server
differentiations into cloud and VM use profiles. Ubuntu Server
focuses on multiple instance deployment, use, and management as a
virtual machine, or member of a larger set of server instances.
"After we downloaded our review copies of Ubuntu Server and
Enterprise Cloud versions of 11.04, Canonical announced that it's
going to move away from its primary cloud management toolkit,
OpenEucalyptus, which we enjoyed using in our first look in Ubuntu
Enterprise Cloud (UEC) in the Ubuntu 10.04 release.
"OpenStack, a collection of applications we've seen before, will
be the direction that Ubuntu supports in the future. We had decided
difficulties with the Eucalyptus commercial versions for cloud
control and openEucalyptus will continue to be supported while
OpenStack is ramped up."