According to an article from Wired, Apple's success with the iPod has pushed MacroVision and SunnComm (the leading producers of audio CD copy protection) to get rid of their Microsoft Windows Audio (MWA) format songs on the current crop of copy protected CDs.

What's in the cards is not entirely clear, but the companies have commented that they are working toward a vendor-neutral format because "the hot portable player of (the day) is a constantly shifting target" according to Adam Gervin, senior director of marketing at Macrovision (quoted in the article).