Having a quick and easy way to share songs I like with my friends is a great idea. Apple's Ping feature in iTunes attempts to do so. Unfortunately it completely fails in that I cannot Ping a song that is not for sale on the iTunes store. I blame every human who has ever existed for this, individually and personally. If it were a more important issue like freedom then I would try to do something about it, but it isn't so I will just whine about it here and move on.