At the tail end of last night’s broadcast of ABC’s World News Tonight with Peter Jennings, they did a short piece on music mash-ups (video only available to ABCnews premium subscribers).

There’s an interview with Mitch Butler and he does a live mash-up demo of Eminem’s Without Me laid over Scott Joplin’s ragtime piano classics. ABCnews also covers the DJ Dangermouse’s Grey Album controversy. Unfortunately, the piece characterizes all mash-ups as completely illegal and alludes to people using PCs and audio software as potentially doing great harm to the music industry.