After downloading the Cairngorm Store I realized that I need the Flex Data Services and a J2EE (Web) Container. Reading some of the feedbacks from the community convinced me to modify the original example and support Business Delegate Mockups which means you now do not need any backend!
The install size is less than 1MB and you can extract import and run without any additional downloads or setups. Due to security issues the file type is doc – please rename to zip extract and read the readme.txt file.
update (22, feb. 2008) : Please check out Douglas McCarrol’s update to the Modified Cairngorm which includes support for Flex 3!