**Update** Added some Amarok on windows screenshots :)
For those who don't know about Amarok, Amarok 2 is the free cross platform music player, with support for album art, lyrics, Wikipedia and last.fm integration.
Amarok 2 is not out yet as it is going to be released with KDE 4.2 sometime in January 2009 before KDE 4.2 :) in 1 to 3 months, Amarok team released beta 2 few days ago, Amarok 2 is cross platform i.e. available for Mac, Windows & Linux (:D). As my Arch installation was screwed up so I'm on Kubuntu, they have a nice repository to try nightly builds of Amarok/KDE4 (project neon), following screenshots are bit old as they are taken from my Arch Installation.
It supports Last.fm integration, Jamendo, Magnatune, Shoutcast Radio service,Mp3tune service etc...
the best feature I like about Amarok2 is Dynamic Playlist.
for collection and statistics it uses MySQL embedded
Lyrics script fetches lyrics as soon as you play the song