No sign of Adobe. I'm not sure that InDesign is doing so well that the general print market can be expected to pick up on it by default. Quark have sponsored the Workflow presentations and are answering questions with plenty of people on their stand.
Xerox still expect Adobe to ship a plug-in for InDesign and Acrobat that creates a JDF file for each job. At drupa I thought Adobe were a bit vague about this idea but Xerox have a definite interest in hard copy. Maybe when this might be available it will be Xerox where information can be found.
Back in the days of a floppy disc it was thought a bit of a security risk to move files on disc between pcs. Tharsten and Positive Focus however have now started to use a USB keyring to show off JDF. It works fine with a web-based MIS linking in to Creo Upfront. Maybe by IPEX wi-fi will be free everywhere.
According to Alan Dixon from Positive Focus, JDF stands for "Job Done Faster".