This Morning, while I was walking through the University Hall, a poster catched my eyes. “LehrBar” – a platform where teachers could present each other new didactic tools and designs – informs everybody interested about a talk on “LabWrite“, a wiki which was created to help students writing better laboratory protocols. Reading this raised the general question in which way Teachers, Researchers, Students, Groups and Organisations use web tools. What do I know about People, Groups and Organizations from Bielefeld University using the Web 2.0? And in which different ways do they use it? In the following, I would like to present some impressions from a short research about interactive, communicative and collaborative web tools used at Bielefeld University.