Adobe Integrated Runtime (AIR), codenamed and originally named Apollo, is a cross-operating-system runtime environment for building Rich Internet Applications, using Flash, Flex, HTML, Ajax, that can be deployed as a desktop application.
AIR has gone Public Beta, so does anybody use it? eBay does, Adobe has more, and who doesn’t love twitter?
Here are some AIR-related resources (and alternatives) that might interest you.
Related Ruby on Rails AIR ResourcesWebORB for Rails by Midnight Coders can be installed as a plugin into any Rails application to expose Ruby classes as remote services. Mike Potter created Ruby on Rails RIA SDK Read More which makes integration much easier.