Christian Crumlish has been designing and writing about online user experiences since 1994. He is the curator of the Yahoo! Design Pattern Library, is in his second elected term as a Director of the Information Architecture Institute, and is co-chair of BaYCHI's monthly program.

He studied philosophy at Princeton and painting at the San Francisco School of Art. He is the author of, most recently, The Power of Many: How the Living Web is Transforming Politics, Business, and Everyday Life (Wiley, 2004). Currently, he is working on a book for O'Reilly Media with Erin Malone called Designing Social Interfaces. He lives in Oakland, California, with his wife, Briggs, and his cat, Fraidy.