Lol, The terminal is not for everybody, but I just feel so much more powerful with a fullscreen terminal open, For the time being if you are using linux (or mac os x too I believe) I will try to put a wiki page up on the google code site with instructions, you can also report issues and stuff there too! Also, if anyone is on desura go ahead and add me, my name is alexhairyman, I sometimes go by hairjelly too.
If you like the idea of programming but have some reason not to, I would definitely suggest python, they have a great tutorial, and everything is extremely well documented, right now I am pretty in to c++ and am exploring some of that right now
(sorry if I get off-topic, but, as a 15-year old with ADHD I feel it is my duty to innocently talk about everything that pops into my brain =) )
GUI is a nice addition, but if you're running Linux chances are you're at least familiar with a CLI (Mac users, maybe not so much :)). One other thing you might consider is adding support to convert any .bmp's you find into .jpg's, since the Linux version requires that. Of course, I can also do it as a simple shell script, no Python required, but then there's NO chance for a GUI :)
There's also the matter of shaders (at least with the purchasable Windows DLC - don't know if any modders are making their own shaders at all), but that's a much more difficult proposition to do automagically...
Thanks for working on this. Even if I don't use it myself, it's nice to see (a) what other people are doing, since you might have a better idea or way of doing things, and (b) that the Linux GSB community is getting off to a strong start.
Now I just need to figure out if I have the time and skills to make my own mod, not to mention keeping it balanced given how easy it is to overkill. I have a couple ideas, but graphics are NOT my strong suit, though I can steal other peoples' images and tweak them reasonably well :P