I think audible.com and amazon were partners (in device sales and downloadable audiobook sales) until earlier this year. I think the amazon purchase of audible completed quite recently, perhaps March or early April? Not sure.
Anyway, when I got my audible-discounted Ipod from amazon years ago, it was a partnership marketing agreement between the two companies, as were the amazon sales of audible products then. I suspect that part of their arrangement won't show a change visible to the casual shopper for some while.
But....part of me twinges when amazon eats the universe. Soon, just amazon, google, microsoft, newscorp, apple (as the obvious counter-example), walmart, ebay, bank of america....a few allowed competitors.....a few foreign sites....a few affiliates.....and many nearly powerless consumers.
"Oh, brave new world!"
"'Tis new to thee."