DebateLab intends to pioneer research towards unlockng the potential of the new dialectical nature of the Web, relying on the coupling of mature fields namely Computational Argumentation, Natural Language Processing, Information Retrieval, Machine Learning, and the Semantic Web. The aim of DebateLab is dual purpose; a) conduct research towards devloping the required thoeoretical infrastructure for representing, mining and reasoning with online arguments, and b) develop and deliver a suite of tools and services (e-journalism domain) supporting the uptake and initial exploitation of the related technologies.