a. "The WildList," by Joe Wells. Originally just covering PC viruses, it was updated last year to help Macintosh users track macro viruses.
b. "Macro Virus List" includes over 500 macro viruses, including both those found only in labs as well as in the "wild."
c. "Who Writes This Stuff?", by Sarah Gordon. Explains a bit about virus-writing experiments and why they may not be a good idea.