Long live the Black-n-Gold.  Definitely widespread.  Living in Henderson, NV now, and more Steeler Bars (and by that I mean FULL Steeler Bars) here that show the games every weekend than you can shake a stick at.  I think the consistant adherence to the blue-collar hard-working substance-over-style image that the team has maintained over the last 4 decades, not to mention the unrivaled consistent success is a reason all of those displaced Pittsburghers have such an affinity for their team.

The attitude and ingrained personality of that region is captured in this Bruce song (unfortunately titled after an Ohio town).   Powerful lyrics and even more powerful performance.  Enjoy.

http://www.youtube.com/watch?v=G-i-YTADw3A