I don't think it sounds much like "Body of an American". Good song though. A music blog called ickmusic had a live mp3 of it and this information:
Another tour debut the other night at Madison Square Garden. The working title we’re going with is “American Land”. It’s not really known yet whether this is a new Bruce tune, but according to Backstreets, “More likely a traditional song with some new Springsteen lyrics.”
“This is an immigrant song for New York City,” Springsteen said before tonight’s new opening number — no, not a song off Led Zeppelin III, but at the moment we can’t tell you exactly what it was, either. A new Springsteen song? More likely a traditional song with some new Springsteen lyrics. On the setlist as “American Land,” it had a recurring refrain of “home in the American land,” but it wasn’t “He Lies in the American Land,” despite that song’s association with Pete Seeger and the similarity in title. Watch this space for more as we know it…. In any case, it was certainly a world premiere, an Irish reel with a Clancy Brothers/Tommy Makem feel to it; lyrically, a vivid portrait of the immigrant experience in the vein of Ry Cooder’s “Across the Borderline.” At the end, Bruce had one more dedication for it: “for all you travelers out there.” - - from Backstreets
http://ickmusic.com/index.php/category/irish/