Greg Wilson, Christophe Coenraets and James Ward have made an Adobe Air application called Tour de Flex. This app includes now 217 runnable flex samples, each with source code, links to documentation, and other details. Check this out go this url and download the 50mb air application. Now you always have your flex examples library with you.
Here a overview of the mapping examples ( google & yahoo maps) with the source code
The Tour de Flex topics
A ebay example.
This air application is a must have for every flex developer. Great Job ria cowboys.