Top 50 albums
This is my top 50 albums chart from lastfm.
Left click to display a subtree treemap. Right click to display the
parent node treemap.
Though my most listened band is Tryo (bottom left rectangle), my
most listened album is Mother Love Bone (greenish square).
Layout
Opera users:
Since I can't disable your right button's context menu, use this extra button
to go to a parent node.