Wikimania is a multilingual and multidisciplinary conference. We have invited speakers from many different fields, including reference work publishers, librarians and archivists, museum curators, software developers, free culture activists, online community leaders, lawyers, journalists, academics and businessmen.
Plenary speakers 
Global Voices : Wikis and information diversity 
Participants: Hossein Derakhshan, Isaac Mao, Milton Aineruhanga and Kasper Souren.
Wikis and Politics 
Participants: Jimmy Wales, Isaac Mao, Ascander Suarez, Jean-Baptiste Soufron.
Tutorials and Workshops 
Tutorial leader: Andre Engels
Tutorial leader: Brion Vibber
Tutorial leaders: Jean-Baptiste Soufron and Enrique Chaparro
Tutorial leaders: Jakob Voss and Erik Zachte
Workshop leader: Frank Antwerpes
Workshop leader: Gerard Meijssen
Workshop leader: Thomas Thaler
About the speaker: Ross Mayfield is the CEO of Socialtext, one of the leading developers of enterprise wikis.
Abstract: A reflection on the development of wikis over the past decade.
About the speaker: Ward Cunningham is the programmer who designed and named the first wiki. Since then, he has invented and written two best-selling books about Extreme Programming. He currently works in Microsoft's "Prescriptive Architecture Guidance" group.
About the speaker: Richard Stallman is the founder of the GNU project and the Free Software Foundation.
About the speaker: Achal Prabhala works on improving access to technology and information in South Africa.
About the speaker: Florence Devouard is an elected member of the Wikimedia Board of Trustees.
About the speaker: Brion Vibber is Wikimedia's Chief Technical Officer and its second employee. He lives in Los Angeles, where he slaves for Wikimedia by day and Wikipedia by night.
About the speaker: Erik Moeller is a journalist and open source advocate, whose first book, Die heimliche Medienrevolution - Wie Weblogs, Wikis und freie Software die Welt verändern, was published last year.
About the speaker: Wolfgang Georgsdorf is an artist and filmmaker who has worked with deaf people for many years. He has produced a sign language dictionary on CD-ROM in the past and is now exploring and promoting the potential of wikis for teaching and using sign language.
About the speaker: Stefan Magdalinski often knows where his towel is.
About the speakers: Domas Mituzas is a member of the core team of Wikimedia developers and server maintainers. His speciality is handling WikiDowns and WikiUps.
About the speaker: Sunir Shah was the founder of MeatballWiki, one of the oldest icons in the wikisphere.
Other presentations 
...and 50 additional speakers and presenters from Australia, Brazil, California, Canada, Chile, China (Shanghai and Hong Kong), France, Germany, Iceland, India, Israel, Italy, Jordan, Lithuania, Madagascar, Mali, the Netherlands, Poland, Senegal, South Africa, Switzerland, Taiwan, the UK, the US, and Venezuela.