Today's Macworld Apple Keynote didn't offer much in the way of shiny new toys (iWork, iLife, blah blah snore), but it did make mention of some interesting changes coming to the iTunes store. (No, not the Beatles catalog. But keep those fingers crossed!) The biggest news is probably that purchases made in the new iTunes Plus will now be DRM-free, and a higher-quality 256 kbps encoding. (If that doesn't mean anything to you, don't worry, just know it's a good thing.) iTunes purchases already made can be upgraded to the higher-quality, DRM-free format for 30 cents per song, 60 cents per video. Starting today, 8 million of the 10 million songs on iTunes are DRM-free, and the rest will follow shortly.