Arista Records filed 12 - yes, TWELVE - copyright infringement suits in various federal district courts, each against John Doe defendants, between Nov. 27 and Nov. 29, 2007. Presumably, all relate to on-line infringement and the defendants must be identified by their IP addresses.
Additionally, UMG Recordings, Zomba, Sony BMG, and LaFace Records filed John Doe complaints over the same period of time.
OTCS has a full-time job and can't read all the complaints - so who knows what is going on? Anyone? Bueller?