[dcalder]

As of right now, Overdrive is advising everyone not to upgrade to Acrobat 8 and Adobe Digital Editions because they don't support transfer to PDAs or Named Activation for use of files on multiple computers. So, based on that, I'd say that Adobe has some work yet to do before it would even be possible to make the files work on the Sony Reader (or, for that matter, any other reader), regardless of Sony's plans.

Err, and I think it's a given that the current PDF files from Overdrive won't work, as I was under the impression that the Sony Reader only handled non-DRMed PDFs and the Overdrive ones are quite definitely DRMed.

It might actually be more productive for interested parties to contact Overdrive and discuss the Mobipocket time issue on Cybook with them. I don't see any reason why they can't use the same system with eBooks as with eAudiobooks and just let the Overdrive Media Console expire the files when the device is next connected after the expiration date. It's not like my little iRiver mp3 player has an onboard clock, after all; the eAudiobooks that I've loaded on it will play successfully even after changing the battery, let alone being turned off. They only stop working after I sync it again (and then only if they've expired).