I have a significant media library (video, audio, photos, etc...). It's all sitting on a 2TB external drive connected to a MacMini. The MacMini shares the media to devices within my house via a DLNA server solution (PS3 Media Server). It works great.
Now that I've gotten a really fast internet connection (5MB up), I'd like to be able to listen to my music when I am at work, for instance. Or perhaps to my iPhone/Android when I am on the go.