I am a last.fm user. Been an active user since March 2nd, 2008. For the uninitiated, what last.fm does is it stores my music plays and tastes and also recommends me music which I might like to listen, based on my tastes … collaborative filtering + social community.
So, they have revamped their site design … added so many widgets (I had sported some on my blog) … now they are allowing this data to be accessed through API!! What this means that the gazillions of programmers out there can come out with their own version of add-ons for this application. What that means … is that there is a big pay load of data to be mined. I saw this music spiral application for instance … it generates my music spiral (dont ask me what it is) … it looks pretty.
If you ask me the exact application .. go figure :-)