DreamIT Ventures has Mark Hughes speak, the guy who literally wrote the book on Buzz Marketing. Mark put Half.com on the map (literally) by purchasing a town and changing it's name to Half.com. His team also was responsible for the Urinal Screen Advertising Campaign that got them incredible exposure (http://tapinko.com/uploaded_images/Photo-45-797908.jpg). This experience has influenced me to ask the question:
What have been the best Buzz Marketing campaigns?