"Last.fm is a service that keeps track of what music you listen to, and then produces a large number of features personalised to you.
You can use Last.fm to listen to music, find out about artists you may like, other people with similar music taste, gigs in your local area, charts and quilts for your personal site, as well as much more." ( from http://www.lastfm.com
Many players already support it natively or have a plug-in. The Last.fm software is Open Source (GPL).
Programmers can download the source code from our Subversion repository here: svn://svn.audioscrobbler.net/clientside/Last.fm
(grab latest version)
Your application is nice but i don't wanna abandon last.fm and I guess I'm not the only one...