I'm working on such a beast right now.

The following are currently in production:
1) Current now playing info from current player
2) Display current artwork from Squeeze Server or Radio Time, depending on what the player's streaming.
3) Ability to select current player from all available...

I'll probably get this functionality posted here over the weekend...

I just started in on adding controls, power play ect...

Running the Squeeze Server web interface on the Nevo is weak at best, not usable from my POV.