I've no idea if this is a ZEVO issue or not, but I've never seen non-ZEVO volumes exhibit this behavior.
My Data pool has an iTunes subvolume on it. My iTunes data lives there. Everything is accessible from the command line, and iTunes works, but if I navigate there in Finder, it appears completely empty.
Here, it get stranger:
Command-Shift-G in Finder, I can tell it to open /Volumes/Data/iTunes/Music, and it opens up and appears empty.
If I do the same trick with a directory one level deeper, such as /Volumes/Data/iTunes/Music/Various, Finder says "The folder can't be found." (I'm staring at it right now in Terminal.)
If I try to get iTunes to reveal anything in Finder, nothing happens.
I didn't have this issue in the past, so I'm thinking about downgrading ZEVO back to the last TensComplement beta, but I thought I'd check here first. Thanks!