Here are some things from the RIAA web site (
http://www.riaa.com)
On their site you can hear their side of the Napster, Verizon, Aimster, and MP3Board legal cases. But I didnt find info on KaZaA.
Digital Millennium Copyright Act: This newly enacted law implements two global treaties designed to protect creative works in the digital era. It prohibits the manufacture and distribution of devices the primary purpose of which is to "pick" the electronic "locks" protecting copyrighted material online. This prohibition enables effective enforcement against those seeking to pirate copyrighted music online. The greatest gains from passage of this legislation will be realized internationally. This bill will serve as a model for ratification and implementation of the World Intellectual Property Organization (WIPO) treaties in other countries, where protection of sound recordings online is not sufficient. Formal U.S. ratification of the treaty package helps move the worldwide ratification effort closer to the 30 countries that must ratify the treaties for them to take legal effect. The law also includes important provisions that clarify the rights of copyright owners and the responsibilities of online service providers to guard against piracy online. In addition, the DMCA also contains critical provisions relating to the licensing of music on the Internet and amending the Digital Performance Right in Sound Recordings Act of 1995 (described below).
Digital Performance Right in Sound Recordings Act of 1995: For more than 20 years, the RIAA has been fighting to give copyright owners of sound recordings the right to authorize digital transmissions of their work. Before the passage of the Digital Performance Right in Sound Recordings Act of 1995, sound recordings were the only U.S. copyrighted work denied the right of public performance.
This bill allows copyright owners of sound recordings the right to authorize certain digital transmissions of their works, including interactive digital audio transmissions, and to be compensated for others. This right covers, for example, interactive services, digital cable audio services, satellite music services, commercial online music providers and future forms of electronic delivery. Most non-interactive transmissions are subject to statutory licensing at rates to be negotiated or if necessary, arbitrated.
Exempt from this bill are traditional radio and television broadcasts and subscription transmissions to businesses. The bill also confirms that existing mechanical rights apply to digital transmissions that result in a specifically identifiable reproduction by or, for the transmission recipient, much as they apply to record sales.
Here is the case about a guy sued by the RIAA (look at all the record companies that went after him).
http://www.riaa.com/news/filings/pdf/pastissues/PengFiledComplaint.pdf