Rolling Stone prints a damning comparison of songs waveforms -- past, present and reissued. And a link to a technical wikipedia discussion (with more examples, and some possible solutions).
But there is one marriage of technology and music I can enthusiastically endorse: Air Karaoke, available on Channel 1017 in New York City (the Oxygen network's On Demand channel). Apparently this has been available for ble years, but I was unaware until the week hours of 2008. Already, this new technology has impacted my life, and certainly, the lives of everyone within earshot.