I refer, of course, to Google book search, which allows you to chart references to names and topics over time. Here, for example, are references to some law bloggers (plus Frederick Schauer, for a 'control' as it were) since 1995. What does this all mean? I've no idea, but I'm sure it will make for lots of holiday amusement. Here's a NY Times piece on the new toy.
UPDATE: And some more:
1. Six "household names" of the legal academy: Ronald Dworkin (NYU), Richard Epstein (Chicago/NYU), Martha Nussbaum (Chicago), Richard Posner (Chicago), Cass Sunstein (Harvard), Catharine MacKinnon (Michigan).
2. Some giants of constitutional law.
6. Legal philosophers: Under 70. (No way to search reliably for Michael S. Moore, however.)
Have fun by designing your own.