I agree. Having "MS" in a Zune domain pretty much takes away all of the value of that domain. Buyers who buy domains don't want to be looking at potential trademark issues, so I'd have to say that MSZUNE.INFO would pull reg fee at best..
If you could contact Microsoft, on the other hand, and get their approval to use/sell the domain name, maybe you could pull mid-$XX.
it's a .info domain that would be providing what i would assume information about the zune. You should be okay as long as it wasn't registered in bad faith. $100.00