It appears that the Computational Fluid Dynamics (CFD) consultancy to the cars is gone.
Advantage CFD’s website now hosts the following message:
"Following a review of Advantage CFD activity, the provision of external CFD consultancy services will be terminated on 31 March 2007. This will enable the Honda Racing F1 Team to devote all of its CFD resources to its race objectives."
Read more on the history of Advantage CFD.