OpenSource Clouds play Rock-Paper-Scissors

"Cisco and CA are working with Citrix to support its CloudPlatform implementation of CloudStack. The news, out of Citrix Synergy in Barcelona, comes as a raft of OpenStack news hits the wire - writes Barb Darrow of GigaOm Cloud"

http://gigaom.com/cloud/cloudstack-strikes-back-in-the-battle-of-open-source-clouds/