Links: 
Sprinkler Identification Number (SIN) Database
ISO Sprinkler System Quick Courses
Minnesota State Fire Marshal Newsletter
WAAC Newsletter "An Introduction to Automatic Fire Sprinklers, Part 1"
WAAC Newsletter "An Introduction to Automatic Fire Sprinklers, Part 2"
Scottsdale, Arizona 10 year study on fire sprinklers
State Farm Insurance study on home fire safety
Prince George's County 15 year study on residential fire sprinklers
Wikipedia article on Fire Sprinklers
Sprinklers Saves Reporting on Lives and Property Saved by Fire Sprinklers