Simplify Media is freeware that lets users stream their iTunes library from their homes to other computers across the Internet.
Simplify Media allows you to create private groups with your friends with whom you can share whichever songs in your iTunes library you choose. Only 2 songs can be stream simultaneously and share songs cannot be burned to CD or uploaded to an iPod. Simplify Media is a free download for Mac and Windows.
Remember you can also use PodPlayer to listen to your iPod songs without using iTunes.