Arjé Cahn is CTO of Open Source Content Management developer Hippo (Amsterdam, The Netherlands). He runs the Hippo open source team at www.hippocms.org. and has earned his merits in the open source world with an Apache committership. Arjé is a regular speaker on the subjects of open source, XML, and Cocoon and has been involved in the organizing committees of several Apache conferences. He has written for both technical and business publications on open source. He blogs at blogs.hippo.nl/arje/.