Excelente artículo en Linux Journal sobre cómo los métodos utilizados por parte del software libre pueden mejorar las técnicas de Extreme Programming y viceversa. En este queda claro que lo que no tiene nada de futuro son los actuales ciclos de desarrollo empleados por parte del software propietario:

Most conventional software development methodologies work on a single release schedule. The development life cycle spans years and essentially is a black box from the point-of-view of the customer, who has to step out of the way and await the day the developers transform his requirements into usable software. This approach offers no scope for change, for feedback from the customer on what is being churned out in the development process or for a cut-and-run.