Gents,
Dunno if anyone's mentinoed this one yet, but Gamelords (IIRC) published a nifty little supplement titled Lee's Guide to Instellar Adventure. I can't even begin to count the number of times I plundered it.
It's written as a series of excerpts from an IN admiral, one Aramis P. Lee, who travelled around a bit after retiring as a sort of troubleshooter/analyst for various movers and shakers. Each section begins with a lenghty blurb from Lee's memoirs that describes a specific world and why it's interesting. The rest of the section provides details about the world in question and then suggests how a GM could use or modify it for their campaign.
Here's the genius part: None of the described worlds have fixed UWPs! Instead a range of values for each UWP entry is given; i.e. Atmo can be 3 - 8 or Hydro must be 1+. A list of worlds in the Marches and on the Rim that match those values is also given.
There's a planet fighting a multi-factional world war, another with a dangerously odd ecosystem, another that has just experienced a "Nearly Everyone Is Dead" nuclear war, another that is a paradise for wildcat miners, and several others. Because each section contains several suggestions on how to "twist" or modify the original situation, each situation can be used multiple times. They're something akin to "super" Amber Zones with more than six options.
Lee's is one of my all-time favorite third party supplements.
Have fun,
Bill