When Fluxblog proprietor and Drive XV essayist Matthew Perpetua launched PopSongs 07-08, he gave it the tagline: "I'll write about every R.E.M. song, eventually." And eventually, he did (save Accelerate, which needs time and the 2008 election results for proper framing). Whether you're a casual admirer or a catalogue completist, the post-per-song format -- and the keen degree of insight ...