Unfortunately, your iTunes library must reside on a Windows XP PC, since that’s the only version of the client available for download. The computer must be up and running and connected to the Internet, too, in order to remotely access your music and you’ll only have access to the unrestricted MP3, AAC and WMA files.
It’s free though, and definitely worth a look-see so you don’t have to worry about loading up your work computer with gigs of music. God (and your IT department) only knows what kind of a slow down you’ll create streaming your music all day.
Make Your iTunes Library Mobile [techcrunch]
Another way to do this is with slimserver from Slim Devices. It’s free in both senses, runs on Mac, XP, linux, or whatever you have. Does not use the iTunes database but builds its own, so you have to be careful about keeping them in sync.
Or you could install http://www.hamachi.cc/ and use your existing iTunes install and libraries. Hamachi is also great for general file access and some other network services. Good stuff!
Works really well. I love the sharing. I also found that they allow you to upload 250 tunes to their servers so that you can listen to them in the even that your computer was off. Very cool. I have already sent out over 100 shares to my friends. I wish there was a way they could comment on my shares. I am sure thats on the way :)