Toys for Bob haven't made games for PC's for a long time, even if a sequel would be made, what platform(s) would be able to run it?
I really hope that the sequel gats made, and also that it wouldn't be limited to just game consoles.
Star Control was fun, and Star Control 2 is one of the best games ever!
If you haven't tried it, do yourself a favor and go get it at http://sc2.sourceforge.net/