"Remote" lets you control iTunes using WP7
On the off chance you are a WP7 user who loves iTunes, you can now have your cake and eat it too...kinda. "Remote," an aptly-named new app by Komodex Systems, let's you browse your computer's iTunes Library and let's you play, pause and control the volume via WiFi. You can also use your phone's keyboard to search for albums and artists.
"Remote" recently popped up in the Marketplace for $1.99 and requires WiFi and the installation of a desktop client on the computer you want to control. It works with both Macs and PCs. Of course we have to wonder what kind of commie you would be to run iTunes over Zune, but hey...we're accepting around here. Kinda.