I've spent several evenings over the past week improving Gutenprint's support for the DNP DS40 and DS80 dye-sublimation printers. Aside from their respective 6" and 8" print widths, they are otherwise identical feature-wise. Here's what's been added so far:
Next up will be to add sane multi-cut print modes (for example, obtaining 3* 8x4" prints cut from a single 8x12 sheet). This is considerably more challenging as Gutenprint doesn't really support this sort of thing.
I should ask around at the office if anyone wants some prints made; if I'm going to generate a pile of test prints I might as well generate ones worth keeping. :)