A half-day single track workshop is designed to gather academic researchers and industrial practitioners at to share ideas and knowledge of know-how, and to discuss all relevant issues including the business models, enabling technologies, and killer applications, of Web-based question answering (QA), especially, the user-interactive QA services and applications. The workshop program consists of two sessions, one for academic papers, and the other for industrial practice papers. Each session consists of a leading talk, followed by three short presentations. Sufficient time is allocated for brainstorming discussions in each session. Categories and Subject Descriptors H.3.3 [Information Storage and Retrieval]: Information Search and Retrieval. General Terms: Algorithms, Design, Experimentation, Human Factors, Languages, Performance, Standardization.