Yay! Now we don't have to send our burnt copies of mono GH3 to Red Octane.
On a slightly more serious note, I think that if you already have a ripped copy of the mono GH3 on your hard drive then you can rename and use the force recheck feature in uTorrent to make it identify that as part of the download, thus cutting your time in half or more. At least, that's what I've heard people doing with customs.
Originally, they released a Wii disc with screwed up audio and when you turn on your surround sound it would only output to the very center speaker (mono). Redoctane/Activision issued a type of "recall" and allowed people to send in their mono GH3's for a remasted disc for free. You also get a cool guitar faceplate and a awesome apology letter! I think that they republished a correct version at retailers so you must've gotten your after the storm.