The essence of Star Frontiers is being resurrected, at least for me, in a new campaign I started in Alternity rules but now have shifted to True20. I am combining Star Drive and Star Frontiers (Star Drive Frontiers?) and adding some elements of Shatterzone to create a new sci-fi setting that I hope to explore over time. Right now, I am running a cmpaign on Wednesday nights but hope to reform my Saturday group around this.
See my new True20 section for updates on that campaign.