http://www.jukefly.com/
This is a cool site that allows to convert your PC in to a music server. You need to sign up, download and install the client (only on the system which has the songs). The streaming quality is very good and fast (and depends on your internet speed). Right now the sharing is limited to one friend. If you have your PC on at home, then you can listen to your songs on any internet enabled system. *It will be more useful, when an album releases early in some part and fans who bought the album can stream the song to fellow fans who haven't bought the album yet or to let people preview the songs in high quality. * Though this type of service has been existing, jukefly.com has a great and simple interface and the client is very thin, with a bit of social networking thrown in, I find it convenient to share and find music. Details here. http://www.techcrunch.com/2008/02/12/stream-your-music-collection-to-anywhere-with-jukefly/
