Developing iPhone applications using Ruby on Rails and Eclipse, Part 1: Serving content for iPhones

This article uses Eclipse with the Aptana plug-ins for Ruby on Rails and iPhone support. The Ruby on Rails plug-in provides Ruby- and Rails-specific syntax highlighting, shortcuts, execution environments, etc. The iPhone plug-in provides a preview environment for displaying your Web application in an iPhone-size viewport.
(Link: Developing iPhone applications using Ruby on Rails and Eclipse, Part 1: Serving content for iPhones)