Yep, this is in the works too, especially for the minor Star Control races like the Supox and the Umgah. I really don't want to make entire races out of them, and only a select few will have their own Sins type races, like the Kohr-Ah do. Typically, if the race is a favorite of mine, I will expand it into a full blown race. I love the Kohr-Ah, hence the whole race. The Ariliou came about because I have one Skiff I am working on, plus the UFO mod that I merged it. It only made sense then to make them a whole race. Plus I am giving them some rather unique abilites too, like the MotherShip UFO they will have, and Quasi space like speed through phasing.
On the block for full blown races so far are the following:
CHMMR/Chenjesu/Mrhmrmm - all one race
Other that that, unless I get requests or a huge influx of 3D models, I will just have 2 more big races representing the New Alliance of Freestars and the Ur-Quan Hierarchy and battle thralls.