Blip.FM I mean. It's not perfect as some composers get stuff removed just like on YouTube but the vast majority support it. I blipped 15 of my favourite videogame composers today link enjoy and join up.

This sounds an awful lot like Last.FM. Is it similar to that or is it something completely different?

The difference is you don't have to own any track. You simply search for it and blip it for people to listen to.

Bloody hell Delixe, yes you have.

Yeah, like Finish The Fight by Martin O'Donnell didn't give you a stiffy.

http://blip.fm/Delixe Enjoy.

I prefer to Gink http://www.youtube.com/watch?v=fKXk1VhAuvE

Is this a site where you can say I want to listen to ozzy osbourne's "crazy train" and actually listen to it or do you have to add ozzy osbourne and hope that crazy train shows up sometime in the next hour? Thats why I stopped using last fm

Find the song and blip it.

Last.fm is an online radio station and as such can't let you play a specific track or they'll need a different licensing agreement for the music; that's also the reason for which you can't pause and then resume a song. When you "add ozzy osbourne" it makes a playlist with artists that are similar to Ozzy and includes tracks of him as well.
Now, I used to use Blip.fm at the beginning but stopped; the reasons for this move was:
[1] First of all the introduction of the video part - at first you only had audio which made it easy and fast to stream on a slow connection without waiting for YouTube to buffer and most importantly I wouldn't get two thousand versions of the song with shitty quality that can be regionally restricted so most of the people that would like to listen to it couldn't
[2] They stopped allowing you to actually upload music to their servers - this means that if you can't find the song on YouTube or their archive (and it happens for the kind of music I shared) you can't upload it to their server anymore as you could in the past but instead you can give them a direct access link to the song on your server (no, sharing servers like RapidShare and co don't work) so they can stream from there and at that point why not set up a front-end for it myself and just serve them (no adds and all that crap).
Now I just mix Last.fm for online radio with Spotify for online specific track/album listening and if I find something I want to share (I tweet it) I just search for a high quality region free video and use that.

You don't have record stores there?;P
Personally, i was never interested in having an account on any musical site, like last.fm, which serves more as a "taste exhibitor", which i feel is plain weird, but i do have a botched clone there, same nickname, same age, but listens to crap. ;D
From Your perspective my post may seem pointless, just like those sites seem for me.

last.fm and the like are actually useful for finding new music.
And personally, Last.fm works for me. If there is a specific song I want to listen to, I either youtube for a music video of it, or just buy it :p

My personal favorite of any of these kinds of sites is http://www.grooveshark.com/
It's great! and doesn't require an account (though you can get one free, and have a bunch of favorites, or you can become a VIP for something like $3 a month, and get a bunch of benefits)