For over a week now, WXPN has been waist-deep in an alphabetical-musical freakout they're calling #XPNAtoZ. It doesn't sound like much, but in fact, it's been fascinating, in the exact same way alphabetizing your own collection is, only... more. One listener was so moved by the sheer breadth of the music at hand that she crunched all the data into one handy doc. What does it tell us? Well, data is in the eye of the beholder, but by any measure, this is some pretty impressive nerding right here.