There has been some great development in the Star Frontiers setting concerning mega corp, the Frontier economy, and touching on matters involving space stations and star ships at the Star Frontiers community development site.
A hot new project has sprung up on the mega corps: http://www.starfrontiers.us/node/7216
In depth analysis of the various mega corps can be found, as well as history discussion concerning the dramatic changes that Pan Galactic Corporation under went as a result of the corporate war fought on Laco. A new PGC company logo from pre Laco War is in development as well.
Look for some fascinating things to come out of this project.