Post-Apocalyptic Shadowrun, Your thoughts and ideas are welcome... Options

[deek]

I'm getting started in the planning phase of my newest campaign. A few of my players are post-apocalyptic junkies and have expressed interest in playing in a post-apocalyptic setting. I've done some research on the genre and really haven't found much that I've gotten excited about. So, I am considering just taking SR4 rules, advancing time ahead about 50-100 years and running with it.

I'd basically keep all the tech and magic available, but limit it (high background counts in most areas, limited runtime/fuel for cyber/vehicles, limited wireless systems and generally just limited resources). I'd likely raise availability on most things way up and limit them to more populated areas...

I know its not "Shadowrun" per se, but the more I've thought about it, the more I think it could be fairly easy to run with SR4 and a handful of limitations (as mentioned above).

So, any of the creative and/or game mechanic minds have some additional thoughts to throw my way? I'd appreciate any input or things to think about as I am planning this next campaign...