RadioActive is a mobile-based, asynchronous, audio-messaging platform. It features one-to-many discussions (think Usenet/Newsgroups) using speech instead of text. There are many design challenges in building a large-scale asynchronous audio conversation space. How do you browse and navigate through the potentially large chat space? How do you skim messages? Leave responses? We are using a novel visual representation and combined interaction technique to deal with such issues.