Olivier Costa's concultancy endeavours can be followed on linked in.

In the same context Olivier Costa has been a regular speaker at the XP days benelux.

2006 - Introducing unit tests to a large evolving application.

2007 - Beware of Agility.

2008 - Working with resistance.

That last one was the start of the infamous wake-up sessions.

The most recent evolution is the startup of Aiki-Yoga dojo in Antwerp, where the core agile mechanics meet the core universe mechanics.