DWR contains a creator that will work with PageFlow objects from Weblogic or Beeehive.
An experimental PageFlowCreator is included with the normal DWR download. You can use this from dwr.xml as follows:
<allow> ... <create creator="pageflow" javascript="ScriptName"/> ... </allow>
This will allow you to make calls into your PageFlow from DWR.
The PageFlow integration was written by Kevin Conaway.