In this paper we present the current status of the CrossGrid architecture. The architecture definition follows from the specification of requirements and design documents. It consists of descriptions of functionality of new tools and Grid services and indicates where interfaces should be defined. The components of the CrossGrid architecture are modular and they are organized in the following layers: applications, supporting tools, application development support, application-specific Grid services, generic Grid services, and fabric. We also present an analysis of the possible evolution of the CrossGrid services towards the OGSA service model.