As a system administrator with a very large music collection, I've always been mildly irritated at the difficulty accessing my "master" music library while away from home.
Enter Simply Media a free, small application which does just as the name promises.
My iTunes library back home just shows up in my shared iTunes listing, regardless of where I am. No firewall hackery, nothing to configure, it just works, and works well.
The iTunes integration is fantastic.
