Feb 23, 2006 - Updating DataService Manged Data with non-Flex Clients
Leveraging Data Services of FES when data is updated via external processes

From Eric Anderson

"One issue when building Flex 2 application is how do you leverage the Data Service features of FES when your data store is updated with a process other then a Flex client. The best way to accomplish this today is to use JMS to listen for an broadcast a change notification to all Flex clients to update their data. In this configuration, each Flex client listen to a JMS queue (using a message consumer) and call fill() when you receive a message that the queue is updated. The JMS queue is notified of a change by the external application that updateds the data. Simple as that!"

Full Article at:
http://weblogs.macromedia.com/eanderson/archives/2006/02/updating_datase.cfm