Mash-up artists and remixers have lacked a single, killer app, but they may have just gotten it. Ableton Live 5 now (finally) supports MP3s, instantly searching your entire hard drive for audio files. Drag and drop audio in, and the software instantly tempo-matches and slices up beats for manipulation. Once this hits public beta shortly, we may see the mash-up scene explode. Link.
3 Reasons Live 5 Could Revolutionize Remixes and Mash-ups