The Central Source for the Fight Against the Destructive Practice of Unsafe Mastering Levels (via J-Walk) is interesting and kind of funny due to the amount of anger the author seems to have about the issue. I'm no expert, but I do actually have a lot of the albums in The Big List of Squashed CDs and can't say the mastering has bugged me on any of them. There's a contingent of people I've run into who are dead set against the trend of louder and louder mixes in pop music. Then there's everyone else who basically couldn't care less but will complain when your stupid song is the quietest one on their mix CD.