This document presents a new learning environment model based on Web 2.0 applications, discussing how the technological changes of Web 2.0 have impacted communication, knowledge, and learning. It reviews concepts of eLearning 2.0 and personal learning environments, then describes the development and implementation of a Web 2.0 learning environment at Darmstadt University consisting of wikis, blogs, social bookmarking, and RSS feeds. An evaluation of this learning environment found that it successfully motivated students and improved learning outcomes.