Quite a quick post this one (which is testament to how easy it is) to show you how to share your iTunes library over the internet, without any complicated SSH tunnels, or port forwarding or anything - but still have it secure. Also, this method allows multiple remote connections with ease (as long as the computer hosting the iTunes library has enough upload bandwidth, of course.) How?

First things first, share your iTunes library on the host machine. Edit preferences, Sharing, Share My Library Over My Local Network (ticked.) Secondly - obviously - make sure you have iTunes installed on your work PC, or any other PC you want access to your iTunes library. And the second to last step - install Hamachi (google it) on both computers. Turn on Hamachi on both machines - create a new network on the host machine & connect to it using the client machine. Start iTunes on both PCs and bingo! You can even play protected content, just by authorising your works PC. Simplicity itself!