2013-04-17: OpenStack Summit (HP, Rackspace, Ubuntu, ...)
2013-04-18: Amazon AWS New York Summit
2013-04-23: Mirosoft Windows AzureConf
OpenStack Summit: HP, Canonical Ubuntu Flex Cloud Muscle | Cloud Computing and Open Source content from Talkin' Cloud
"...real-world OpenStack cloud deployments involving Best Buy, Bloomberg, Comcast and HubSpot... HP and Canonical to offer updates on their respective public and private cloud efforts.
AT&T, T-mobile and China Mobile are running OpenStack with Ubuntu..."