I am testing a service called Simplify Media, which is potentially really cool. It has not been hitch-free, but when it works, I can play any song in my home library on my iPhone or laptop, anywhere in the world where I have a connection. You can also share libraries with up to 30 friends.
It has worked fantastically on my own library, and listening to a friends’, but he had trouble getting to mine. I still don’t know why, since I was able to access mine with no problem.
Oh, yeah – it’s FREE!