The Zune 4, 8, and 80 have been out like a week now. Zune 80s are pretty much sold out everywhere though. I'll share my little pro/con list(in comparison to the old Zune stuff).
Pro:
-Wireless Syncing is a plus
-DRM-Free 320kbps Mp3 is awesome
-New desktop software is pretty and easy to use
-Podcast support
-Zune 30s were updated with the new firmware
-Zune Social
Con:
-The colors kind of suck except the Microsoft employee exclusive yellow
-Desktop software doesn't support batch editing of ID3 tag info anymore
-Supply issues
-No OS X Support (Obvious)
-Price isn't anything amazing
Pro:
-Wireless Syncing is a plus
-DRM-Free 320kbps Mp3 is awesome
-New desktop software is pretty and easy to use
-Podcast support
-Zune 30s were updated with the new firmware
-Zune Social
Con:
-The colors kind of suck except the Microsoft employee exclusive yellow
-Desktop software doesn't support batch editing of ID3 tag info anymore
-Supply issues
-No OS X Support (Obvious)
-Price isn't anything amazing