The following are links to short EFF articles as of 11/11/2005 in chronological order (oldest first):
Uproot Sony-BMG's Invasion of Your Privacy and Your Computer
Sony-BMG rootkit DRM in a Nutshell
Are You Infected by Sony-BMG's Rootkit?
Now the Legalese Rootkit: Sony-BMG's EULA
Sony-BMG Rootkit: EFF Collecting Stories, Considering Litigation
New Virus Exploits Sony-BMG Rootkit