Ever since word got out that Elliot Spitzer was investigating the major labels' pricing at online music store, there's been speculation -- though not any good theories actually printed -- over the focus of the investigation.

Digital Music News reports that the Spitzer's office is looking at "clever contracts" crafted using most-favored nation clauses and, here's the really interesting part, "the right to audit competing agreements on an annual basis."

The roles of Apple and other online sellers are also part of the investigation. "Everybody expects to be contacted, and some already have been," said Jonathan Potter of the Digital Media Association last week, adding that he thinks the investigation has the potential to be "full-blown."