The new AC/DC album will be sold exclusively at Wal-Mart. Yes, it's about sales but it's also about hyping a hugely profitable tour.
And: how silly does AC/DC's previous deal look right now: "In August 2007, Verizon Wireless snagged the exclusive rights to sell the band's entire back catalog through March 2008, becoming the first and only digital music store to offer AC/DC's content. But the deal was limited to full-album downloads. That requirement is one of the reasons that AC/DC's music has not appeared in digital form to date. Because full-album downloads are too large and too expensive to sell from mobile phones, Verizon sold them only from the PC version of its VCast Music service, for $12 an album."
A Wal-Mart deal is probably the best first step in catching up.