Our experiments have shown Web 2.0 services indeed stimulate active participation (principle "individual creativity"). Participation in the micro-blogging service was high and continues until four months after the lecture has finished. Usability of the services was judged as being rather good. About 75% of the microblogging users reported that registration and usage of the service was easy. This supports our claim that using existing Web 2.0 services can hold advantages since the burden of designing an easy to use interface is taken from the researcher.
An analysis of a questionnaire (83 participants) showed that three quarter of the students liked to use the service; about 50% used it at least once a day or more often. Only 5% disagreed to the statement that the usage of the microblogging service improved the overall atmosphere of the course, and again only 5% did not find that the microblogging improved the sense of community. 94% had the impression that they were able to improve their English.