If the chassi had to make use of external keyboard and the internals were more in the 15 x 10 cm ballpark (Mini-ATX 15 x 15 cm). What would it look like and still be practical? (small, stable and don't scare wife(s))
Wives? You from Utah?
Guess you could always try to find an old A4000D case, you could probably hack a Mini-ITX board into that quite easily.
slaapliedje