For what seems like our umpteenth Pearl Jam news post in as many days (umpteen!) we just read over on Rolling Stone's Rock Daily blog that the lucky winner of the band's scavenger hunt this week is going to receive an Eddie Vedder demo of new Backspacer song, "Speed of Sound." RS is describing the track, which is as a a quiet number of a sonic feather with No Code's awesome "Off He Goes" and even Riot Act's acoustic snore "Thumbing My Way." You can check all of the pieces of artwork included in the hunt over at Wikipedia, your one-stop knowledge hop. Remember that Backspacer will be on Target shelves starting September 22nd. We're excited.