Finally broadcasters are moving on this issue. It has been a project of the FCC for 40 years to address this. I work in this industry and I absolutely HATE the volume difference on commercials. The technology has been there for quite some time, the excuse about digital making it easier is a smokescreen. If they can't do it on their own then hammer the bastards with penalties. Both for the ad-maker and the broadcaster.
(h/t Kevin Drum)