While it launched in July 2010, the Rackspace- and NASA-led OpenStack open-source cloud initiative gained real traction in 2011. OpenStack is now in its fourth release, called Diablo. The project has now drawn more than 120 participating companies, including Cisco, Citrix, Dell and others into the OpenStack community. Recently, HP has vowed its commitment to OpenStack. The OpenStack project also has roughly 300 active developers and has experienced more than 50,000 downloads from its code repository, which doesn't take into account downloads from other sources. In 2011, Rackspace also launched Rackspace Cloud: Private Edition, which offers a reference architecture around OpenStack clouds and puts OpenStack cloud deployment capabilities in the hands of select systems integrators. In 2012, Rackspace expects to launch the OpenStack Foundation, which will handle the project governance and trademark and copyright ownership for the OpenStack cloud.