What Would You Want to See in a New Major Race?

Anyone ever do or know of a conversion of the species from the 1980s Star Frontiers? With humans and three (seven if you take the four additional races in Zebulon's Guide expansion) comprising what they collectively call "The Frontier" I could see following the galactic arm a few dozen sectors coreward from charted space and finding another Humanity coexisting with a bunch of other sophants.