The document discusses various options for implementing distributed processing in Ruby on Rails applications. It describes libraries like DRb, BackgroundRB, Starfish, reliable-message, and AP4R that can be used to distribute tasks across multiple servers. As an example, it outlines how the Working With Rails site used AP4R to distribute the fetching and parsing of third-party RSS feeds across multiple machines to improve performance. It also discusses some challenges of distributed processing and when it makes sense to implement.