An unofficial repository could be thrown together, it would need a host though. An easier solution would be to just have the latest build made into a .rpm, .deb, and .tar.gz for the more common distros. Another solution that would probably be the best would be to make a linux .run installer script for it like most commercial linux games use, and those games with Loki installers.
The Linux build still needs some work though *cough* audio.