During last August's Agile 2010 conference, I attended a session that used a board game to simulate the collaboration between developers and UX professionals. The object of the game was to coordinate the schedules of these two groups, who normally follow the beats of different metronomes. On top of that basic timing challenge, unexpected events complicated this dance between development and UX.
While this session does show a novel application of serious gaming (one of my favorite topics, in case you hadn't noticed), the interesting aspect of this session is that it happened at all. Until recently, UX was not a major concern for Agilists – or most people developing software, for that matter. The phrase, "And then we'll throw a UI on top of it," summarized the indifference of all too many development teams to UX concerns.
In the last few years, many teams have learned a new attitude. Instead of treating UX as a tarpaulin, thrown over the application to clumsily hold it all together, UX is as much a part of the system as the technical architecture or the application logic.