Who is Making Cases out of Natural Materials?

alansz asks: "I've been rereading William Gibson's Idoru lately (insert your favorite bookstore link). The main character uses a computer made by 'Sandbenders', an Oregon commune that designs computer cases (and parts) from natural materials like stone, wood, glass, etc. The theme is a blending of the natural/analog and the relentlessly cybernetic/digital. Like the imaginary customers of this commune, I find the idea of such a computer very appealing. There's a fair number of case mod stories here on Slashdot. Have any of you actually made (or decorated) or found a company that makes PC cases that incorporate unusual materials and a natural aesthetic?"