Life long, flexible, collaborative, and personalized learning are words that are being increasingly used, henever education is discussed and designed. They express new and important demands on learning architectures, both with regard to pedagogy, organization and technology. Traditional learning architectures are based on teacher-centric and curriculum-oriented “knowledge-push”. In this paper we present an infrastructure, an architecture and a number of frameworks and tools that support learner-centric and interest-oriented “knowledge-pull”. We see them as a contribution to a Public e-Learning Platform, which can achieve true interoperability based on open source and open international ICT standards.