Garlach44 offers a selection of laptops preinstalled with Trisquel GNU/Linux.
Los Alamos Computers (LAC) sells laptops, desktops and servers preinstalled with fully free GNU/Linux distributions, including gNewSense. In addition, they donate a portion of every sale of such systems to the FSF.
InaTux also offers computers preinstalled with gNewSense.
ThinkPenguin.com offers computers preinstalled with Trisquel.
You may check out and promote an idea about gNewSense being preinstalled on computers from Dell.