We always knew the buildings where Captivate plays were cutting edge – after all, they’re equipped with the world’s most innovative news-and-entertainment delivery system (can I get an ‘amen’?).

And now there’s another reason to salute their cutting edginess: they’re green!

So says no less an authority than the EPA, whose list of cities with the most Energy Star qualified buildings for 2008 (pdf) is dominated by Captivate markets.

Captivate Network broadcasts in 17 of Energy Star’s top 25 cities, including all of the top 13. At No. 1 is Los Angeles, whose 262 Energy Star qualified buildings put it well ahead of the pack and enabled the city to save $87.2 million in energy costs last year.

For a good illustration of how effective the Energy Star program can be, check out USA Today’s story explaining how JC Penney has saved up to 30% in some buildings.

Rounding out the top 10 are San Francisco, Houston, Washington, Dallas-Fort Worth, Chicago, Denver, Minneapolis-St. Paul, Atlanta and Seattle. (Boston, Captivate’s home city, finished at No. 11).

Check out Energy Star’s list to find out if your Captivate-enabled building made it.

If you work in an Energy Star standout, let us know by commenting below.