How many Linux distributions provide officially Openstack support

In the same time as Openstack gets more mature the number of Python code line increases and the software become more complex. The usual tasks like installation, support and operational maintenance start to get more complicated and require more advance skills.

Seeing the opportunities on the market companies like Rackspace, Red Hat and Ubuntu rolling out new processes for sales and support to address these needs. As a prove of evidence below is couple of screenshots from Openstack Ubuntu presentation The promise of the Open Cloud with further links in references section.

References

http://www.rackspace.com/cloud/openstack/ 
http://www.redhat.com/about/news/press-archive/2012/8/red-hat-announces-preview-version-of-enterprise-ready-openstack-distribution
http://www.ubuntu.com/cloud/private-cloud/openstack 
Videos from 2012 Openstack Summit in San Diego