Cloud computing is already a major trend in IT. Cloud services are being offered at application (software), platform and infrastructure levels. This paper presents our initial modeling efforts towards service creation at the infrastructure level. The purpose of these modeling efforts is to understand and reason about the service creation process. The paper presents a conceptual model represented as a UML class diagram, and identifies the interactions between service providers and infrastructure providers that are necessary in order to set up an execution environment and deploy services on top of infrastructure services. Although the models are far from complete, we are confident that they already give us some insight in the service creation...