Tom Tomorrow’s Backspacer cover’s being revealed today via an on-line treasure hunt: Bits of the art are showing up on nine different sites as we speak. See, for instance, the first chunk at drownedinsound (and note where it fits in the overall schema at the Backspacer art site). Or view the one at Rock Daily. Or, if you don’t like surprises, you can see them all in a small composite we found at Wikipedia as well as the bigger images at antiquiet. My point being: If you find them all, which doesn’t seem so hard, you may get a small sense of accomplishment. More importantly for Pearl Jam fans, you also get a download of “Speed of Sound,” a Backspacer song Vedder performed solo earlier this month. Get Googling.