I'm well aware that in the world of version control systems, there's a decentralized model, of which Bazaar is a worthy example. We had a good presentation (click on "presentations" at left) from Russell Adams not long ago regarding the broad version control picture and that particular application. There is another perspective, though, being the centralized organizational approach, of which Subversion is a worthy example, and we'll have a show on that program at our next meeting (July 25th).
One reason for doing a Subversion show (in addition to having competent personnel to deliver it) is that nothing succeeds like success. Subversion is one of the leading version control schemes in IT today, and probably the most popular one in the open source movement right now. So we'll give it its due.