A big thing missing in many of these pages is the tracklist--which we can often see, but lack the kanji skills to properly type out. While searching for some info related to one magazine a bit ago, though, I ran across a relevant section of a Japanese wiki. It lists most or all of the magazines and pamphlets through July 2011, and though it's far from comprehensive, it also has the tracklist for many of them.

I'm a little hesitant to just trust some third party info source, but at least in the cases where we can see it matches the back cover or DVD menus this seems pretty good.