Gnoosic is a hassle-free recommendation service. If you can think of three bands you like, it'll start cranking out suggestions for your future listening pleasure.

iPhone/iPod touch: Bandsintown, the previously mentioned webapp that offers personalized concert recommendations, is out with an iPhone app that not only shows what's playing nearby with geo-location, but scans your music to recommend like-minded artists.

We’ve covered the online music community Bandsintown a

Free music search engine and player Fizy doesn't do playlists, offer downloads, or fancy looks. What it does have is more than 75 billion MP3s in its index (supposedly), and a really fast search function.

Social software and social networking 2.0.