Flex in Java EE applications is used often to provide sharper user interfaces. However, integrating it with different data sources is the gist of most Flex development. In this post Jeff Douglas explores the integration of Flex with Salesforce.com remoting API, as well as the deployment of Flex on Google's App Engine. Read Jeff Dougla's post 'Rich Internet Applications Using Flex, Salesforce.com and Google App Engine': http://blog.jeffdouglas.com/2009/08/20/rich-internet-applications-using-flex-salesforce-com-and-google-app-engine/