With the ITX form factor seems to be desired I propose that the a custom case design be implemented. Something that reflects the desires of the community.
The design can be executed in a program like solidworks, Maya, or Rhino and actually a 3D file of the design can be printed via some low cost rapid portotyping methods. The resulting casework will require a fair amount of sanding, paint primer, and painting but... hey kids, this is homebrew. But it's possible.
The case designs 3d file can be available for free so that as rapid prototyping costs come down you will be able to print out a case or shell for less money...
Any thoughts?