Just caught this little bit of info from GC over at IGN:
UK, August 20, 2008 - A subtly redesigned Xbox 360 controller has been spotted on the showroom floor at this year's Games Convention in Leipzig, sporting a new-feel d-pad that addresses the previously unresponsive and spongy model.
While aesthetically identical to the previous controller, the d-pad has been re-engineered to offer more instant control, with an eight way input taking place of the previous four. A brief hands-on with the controller playing Pro Evolution 2009 proved that the redesign has been effective, with the d-pad sitting in a larger rocker and proving more tactile.
It's expected to release at the same time as this year's Pro Evolution Soccer, and the re-design is thought to have been inspired by the imminent release of Street Fighter IV.
We'll have photos of the new controller - though don't expect to see the difference - and further impressions later on.