Zune 1.3 now available
Zune 1.3 went live earlier today. You can get the update (if not prompted automatically) by starting the Zune client on your PC and then going to Options->Help->Check For Updates. Once you update the PC software plug in your device and you should get prompted to update it as well.
This update improves stability, some syncing problems, better power management on the device when using radio and fixes the skipping some people were experiencing when playing marketplace content on the device.