re architecture construct, implemented by technologies found in a category of middleware infrastructure products usually based on Web services standards that provides foundational ser- vices for more complex service-oriented architectures via an event-driven and XML-based messaging engine [6]. In this way, an ESB is a flexible connectivity infrastructure for integrating applications and services. Given the trend toward converging of network and enterprise/Web2.0 ser- vice domains, operators have begun to change their SDP landscape in order to Enabling Service Delivery in Next-Generation Networks build SOA-bases service component sets that will empower their next-generation service and product assembly. There is a need to define these components' functionality and requirements such that they are suitable for the Web 2.0 style of exposure. 4.3 Network/IT Convergence: Changing the Service Delivery Methods Over the past few years, new technologies like IP networks, Web service technolo- gies, and virtualization have emerged and reasonably matured in order to drive a new computing platform aiming to be highly distributed but with a central man- agement, accessible remotely as well as enabling new business models for digital services and infrastructure support. This new computing platform-discussed under the term cloud computing-is enabled to stretch over all service markets, and supports the consumption of service and infrastructure on demand, and is aiming to reduce the cost of IT infrastructure and a faster time to market for new services. A possible definition provided by NIST [7] for cloud computing can be given as following: "Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of con- figurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction." The definition and concepts of cloud computing are still evolving and not yet well define