Abstract
We present three case studies which illustrate the new networks at the disposal of the leader of small company: importance of the weak links in club of leaders, use of Internet for " dé-problématiser " the relation between the accountant and the leader, share and re-use of knowledge between craftsmen via a base of experiments "on line". Today the leader of small company can have on Internet news informational sources, to build a network relational innovating "with weak link".