iTunes' new music sharing feature is very cool indeed. After enabling sharing from behind a firewall in the system preferences - as documented in this Knowledge Base article - Kev and I were able to view each others playlists and stream music remotely with ease. Sharing options can be found in the iTunes preferences and if you know the IP address of a shared playlist, you can connect to it in the iTunes Advanced menu. Let me know if you would like to share some music.