Real-world examples of IDS or IPS use

One theme in this course is effective use of IDS tools to defend against specific types of attacks and misuse. How effective are companies and other organizations at applying IDS for specific purposes? Your assignment for this week is to search for examples either of explicit statements of need for IDS or IPS technology, or for an example of how an organization successfully uses these technologies to defend against specific threats. Possible sources may include news articles, white papers or recommendations from analysts, or even case studies or customer testimonials about specific vendors in the market.