Case Tool Index from Abend-Aid - Chen - ????. There are a lot of them
Sports Car and Tractor example (When Requirements go bad)
Fixing the Requirements Mess (CIO Magazine)
Context Diagrams (Do not expand them to include architecture)
Requirements Development E-zene
Walmart RFID Mandate (link to Tech Republic)
Open System Architect (ERD)
Interviewing Techniques (TechRepublic)