Past March I was contacted by Bastien Nocera of Gnome Desktop project expressing interest in including parts of Borealis into the default Gnome Desktop project which I honestly found rather flattering. Long story short, parts of Borealis are now included in the default gnome-audio package.
 
For more info, visit:
http://linux.softpedia.com/get/Desktop-Environment/Gnome/gnome-audio-37520.shtml
 
For more info on the Borealis theme click here.