Configure ERP conectivity to a Flex application via a web service

I am developing a Flex application that will need to 'pull' information from an ERP system such as SAP or Peoplesoft via the clients web service.

My application will need to pass credentials & query to a Query_URL and receive the returned data. I saw a Flash Builder 4 presentation where the Adobe evangelist created a simila开发者_如何学Gor application using Twitter.

Insights or links to example code would be appreciated.

Tour de Flex contains some examples for making SOAP and plain old XML Web Service requests (under Data Access). This is the typical way that requests are made to a back-end ERP (or similar) system.