We're not sure why the music industry thinks consumers want to buy even more physical media, but it can't seem to stop pumping out plastic in a futile attempt to stay relevant -- this time it's an initiative called slotMusic, announced today in partnership with SanDisk and several major retailers. The 1GB slotMusic microSD cards are preloaded with DRM-free 320kbps MP3s, and are aimed primarily at mobile phones -- the idea is that you'll be able to buy music and listen to it without having to sideload it onto your device using your computer at home. Sure, we can see the appeal of that, but when we half-facetiously asked SanDisk's reps if they expected us to carry around a stack of individual microSD albums, they didn't laugh when they said yes, and even told us that slotMusic media binders would be available at launch -- no, they weren't kidding. We're not sure anyone's going to be sold on going back to lugging around physical media with the iTunes and Zune WiFi stores out there, but it sounds like we'll be seeing quite a push for this from retailers and the labels -- and artists are apparently enthusiastic about using the full 1GB of space to include content beyond basic liner notes and cover art. We'll see when these launch around the holidays -- if we had to guess, we'd say this is just Ringles and CDVU+ part III.