Π r no longer ²
All the available Raspberry Pi cases are variations on the rectangular theme. Boring.
I was inspired by a milled aluminum case that someone posted, but can no longer find, that was round, had one opening, and all the cables were routed around posts within and out that opening. I proceeded to design a 3D printable case of my own that had that overall design.
Design files here: File:Picase.zip