This document discusses JRuby and cloud computing platforms. It provides pricing details for a pay-as-you-go cloud computing service starting at $8,800 per month for 1 CPU and 1GB RAM with 30GB storage. It also outlines the included services such as firewall, global IP address, OS templates for RedHat, CentOS, and Windows 2008 Server, backup and more. Finally, it discusses how JRuby can be used to build applications on cloud platforms with technologies like Rails, Sinatra, Rack, message queues, and job processing frameworks.