But Traveller IS a western, base on Marc Miller's original idea.
Per Mark Miller, Traveller is set in the "Wild West", "Pony Express Days" of the future. The whole "look and feel" of Traveller is similar to the late 1800's, after the American Civil War, where people travel around on steam powered tramp freighters encountering gun slingers, pirates, crooked merchants, etc...
Even on the COTI boards back when T20 came out, every single person I spoke with on the boards loved the fact that a show had finally come out that was so close to the spirit of Traveller.
It's true there is no connection at all between the history as invented by Marc Miller, and the History of Firefly as invented by Joss Weadon, but the look and feel of Firefly, crew struggling to keep their ship flying, the adventures they encounter, is very close to Marc Millers original idea. Maybe there has been a lot of drift of the concept of Traveller since it's introduction.
Anyway, you guys have your own concept, which is cool.
By the way, I never watched Farscape much, I alwasy called it... MUPPETS... IN... SPACCCCCCEEEEE!"

Living organism spaceship or something like that... right?