
College students are generally considered to be the most active users of peer-to-peer networks. That's why it's not too surprising to see RIAA make a major move against them. Several universities have already signed deals with for instance Napster to allow their students access to legal music services at a reasonable price.
The rest of the sued individuals were users of commercial ISPs. Lawsuits were brought against them in California, Colorado, Missouri, Texas and Virginia.
Source: Reuters