SGI
is not only well known for building powerful systems, but also
for their design. So there are already some attempts to build
modern and cheap PC hardware into SGI cases (and this is not so
easy) ot other ineteresting case mods. This page lists some of
them.
SGI Casemods
Illuminating
an O2 - This project is about adding some cool blue light
to an O2. Very straight and simple.