In less than a decade,  iTunes, YouTube, Pandora, blogs, and podcasts have all changed the way we interact with music online today. This year in particular has seen an explosion in a new online music space – one that’s based on socialization, sharing, and discovery. So here are 5 new new apps that are dominating this space and showing the old players how it should be done.

Each taking a new spin on music as a shared experience, Soundcloud, Shazam, Roqbot, 8tracks, and Soundtracking are providing new ways for us to connect our social lives – whether online or offline – to the way we listen to the music we already love, discover new music we hope to love, and share it with our friends.

Soundcloud: Rapidly increasing in popularity over the last year, Soundcloud is a music platform that lets users upload and record originally created music and sounds and share them with others. Users can comment on exact moments in the songs with timed comments, often starting active conversations among the community. Songs can easily be shared on Facebook and Twitter, and Soundcloud recently integrated with Foursquare, giving users the option to ‘shout out’ links to songs or record audio at locations they check-in at.

Shazam: Most of us are already familiar with Shazam, the iPhone and Android app that allows users to discover new music by identifying songs we’re unfamiliar with, or songs that we know we’ve heard, but can’t quite place. Shazam recently announced a new layer to their music discovery service – Shazam Friends. Allowing users to connect to their Facebook friends, Shazam Friends users can now browse songs that friends have tagged and use friends’ tags to create their own playlists. Instead of just tagging a song offline and having it simply exist on the Shazam app, Shazam Friends helps spread music throughout our social networks.

Roqbot: A jukebox on your iPhone, Roqbot is a location-based app that lets users DJ their favorite bars, restaurants and cafes. Adding another layer to services such as Foursquare and Gowalla, users can check-in at a venue and buy songs through credits purchased with Amazon, Paypal or a credit card which are played through the venues’ jukebox system. Users can also view and vote on the upcoming song queue and publish their music picks to Twitter, Foursquare, Last.fm and Facebook. Still in beta, Roqbot is currently only offered at a few select venues, but will be increasingly available throughout the upcoming months.

8tracks: Half music discovery service and half curation tool, 8tracks is a digital answer to the lost art of the mixtape. By using 8tracks, listeners can create their own custom playlists that can be easily shared with others by uploading their own MP3s or using songs already imported into 8tracks’ library. These playlists can then be streamed online, tweeted, and embedded onto other websites. 8tracks’ iPhone app was recently released, giving users the option to listen to their playlists on the go.

Soundtracking: We’ve all had those musical moments when the perfect song is playing at the right place at the right time – SoundTracking allows users to share the “soundtracks to our lives” with friends as they happen in real time. By either searching for a song or tagging it (similar to the way Shazam works), users can create a soundtrack, add a photo, tag it with a location, comment, and circulate it through their Facebook, Foursquare and Twitter networks. So not only are we sharing the music itself, but the experience surrounding the music.

These are only a few more out there such as SoundHound, that add a host of new social elements  to music players across various mobile devices. These are just some of my top picks. It may be too early to tell how much influence these services will have on our everyday music consumption, but they do show potential interest in having features that take us from a one-on-one relationship with our music players to a mixtape of carefully selected songs that we want to share with the world.