While looking for most optimal hardware configuration for a small size AX2009 deployment, I came to know that there is not enough information available either from MS or any of its partners about it. There are a couple of resources like http://www.microsoft.com/dynamics/en/us/using/ax-system-requirements-2009.aspx and benchmark study on partnersource but the resources are not as helpful as there were for AX3.0 or 4.0.
In order to find out these hardware requirements, I had to spend a lot of time on each individual component configuration (DB, AOS, Terminal Server etc) finding out the correct piece of processor, RAM and HDD capacity, Network bandwith etc.