They link to this Yahoo article which has all the details.

The new media can hold up to 11 hours worth of MP3s or nearly a dozen prerecorded albums with a 500 MB capacity for each disc, according to reports. Consumers will need to buy new devices, projected to cost between US$199 and $299, to play the audio discs, say sources.

The new discs -- both blank and prerecorded -- are expected to be released this fall, say DataPlay officials. Blank discs should cost between $5 and $10, with prerecorded prices on a par with CDs.

If you go digging around DataPlay.com, you find that they've got a pretty nifty form factor (teeny, tiny magneto-optical discs, similar in size to a CompactFlash card), and you can already (or will soon be able to) buy standard MP3 players that use it, as well as a USB gizmo for your computer. The real competition for these things are flash cards, so you have to compare the prices to flash cards, not blank CD-R's.

My guess is that they plan to put some kind of copy protection bit at the front of every disc and program all their firmware to get funky in the presence of the copy protection bit. Of course, somebody will figure out how to reprogram their firmware and then it's back to the current world.