Spotted at Trek World, displayed at the factory during their demo rides, a lugged steel retro concept bike:
http://www.flickr.com/photos/2460083...7621933633653/
http://www.flickr.com/photos/2460083...7621933633653/
http://www.flickr.com/photos/2460083...7621933633653/

Sorry, no closeups of the lugs, but they were fairly decorative, definitely more ornate than traditional Trek lugs of the past. Literature said they were laser-cut. Love the retro logo, and headbadge.

Dear Trek: yes, please for production...