Opened Up
Tom writes – “The Intel Mac mini’s case is just like that on the PPC model and can be opened by prying upward with a sharp putty knife while working your way around the bottom of the case.”Link.

Apple and Makers modding minis – Link.
Making a Macswagen – Adding a Mac mini to a VW: a pro tells us how he did it. MAKE 03 – Page 54.