Hello, I would like to cast my vote in favor of a Linux build.
What was used to make FamiStudio will dictate the amount of work necessary for a Linux build. Maybe BleuBleu can shed a light on this?
Woah, thanks for the Ubuntu screenshot. It really give me hope. that I'll be able to use your software soon. Hopefully, someone with more knowledge and experience can make themselves known here and help you out. It did with Pixelbox almost immediately, so I'm keeping my hopes up!