Zune 2.5 software upgrade will be out tomorrow. This upgrade focuses on two areas: Zune online music community and enhanced integration of content, software and the store.
One feature that I am eagerly waiting for is the ability to create auto playlist. I want to quickly access the music that I added in the last 7 days. Hopefully the new Zune desktop software supports a better way of managing the metadata.
Find more info at http://www.zune.net/en-us/press/2008/0505-springupdate.htm