"Business model" is one of the latest buzzwords in the Internet and electronic business world. This paper has the ambition to give this term a more rigorous content. The objective is threefold. The first one is to propose a theoretical e-business model framework for doing business in the Internet era. The second one is to propose a multi-dimensional classification-scheme for eBusiness Models, as opposed to the actual tendency in academic literature to use two-dimensional classifications. The final objective is to define critical success factors, based on a field study in order to find out and compare the performance indicators used by e-business firms which are competing with similar businesses models.