Oh this is not something we want to post as this is just bad, bad bad. Evidently, on September 13th Microsoft is reducing the number of devices upon which you can sync with the Zune music service from 6 (3 computers and 3 devices) to just 4 (at least 1 computer and any combo of 3 PCs and devices). You'll also need to download at least one new song to each device to continue using the service.
We're none to pleased with these changes but have a feeling it has something to do with licensing from the music companies, reduction in costs to those licenses and perhaps trying to reduce "sharing" of Zune passes. Regadless, that's just lame. Users are reportedly being sent emails with the following information and you don't have a choice to the change outside of cancelling your subscription.
Update: LiveSide is reporting (via EnConnected) that this is only for Europe and not the US, where as of now, we will still be able to sync to 6 devices. This should ease over tensions between our Euro and US readers /sarcasm.
Thanks, Lee T., for the images and info!; see also My Microsoft Life