Why should developers care about IaaS? Think of your Windows Azure Datacenter as an Object Model(OM). "IaaS OM" can help us build cost effective systems by only turning on the parts of system that are needed and when they are needed. Additionally, systems built using IaaS can not only be more fault tolerant but also scale in the direction of business growth. We will begin this session with a review of key Windows Azure IaaS concepts including compute, storage and VNET. Next we will walk the "IaaS OM" using Windows Azure Power Shell SDK, including a discussion of bootstrapping VMs. Finally, we will walk through a collection of IaaS scenarios including virtual branch office, single pane of glass for managing on-premises and Azure based resources and hybrid applications that combine IaaS & PaaS.