I really like my Zune, except for one thing- I'm obsessed with battery life so I tend to keep the wireless radio off except when I want to actively look for others.  The likelihood of users to do this could severely diminish the "social" aspects of the device.  I want to be social, but I don't want to run two WiFi radios between my laptop and my Zune, unnecessarily using up battery power.

What I really want is a small utility that runs on my laptop and notifies me when a Zune comes into the area.  It's running WiFi so it must have some sort of broadcast/ID mechanism no?  I can see all sorts of interesting applications of this- mashups that show how many Zunes are available in a given area for one.  It would be interesting to see if I could use my laptop to broadcast the fact that I have a Zune, and take requests.  Then I'll turn on the radio and away I go. And with Vista support now out for Zune, I'm hoping someone will write the ZuneFinder gadget.   Anyone working on this (psst. Phil Torrone, psst) :)