Virtualization and cloud computing have become household technologies for data centers and large infrastructures as well as small shops and startups. This tool-agnostic workshop is for practitioners who want to share their experiences and challenges with others. The workshop is mostly intended for people who are managing virtual infrastructures and clouds. We will have discussions on a wide range of topics, from educating users, through deployment strategies, to storage and networking issues. Everyone who cares about cloud technologies is welcome to attend. Participants who want to contribute content such as experience reports or short intros on specific topics that interest them are invited to send a short description to lisa12ws-cloud@usenix.org.