Not sure if this has been posted about before but this is a cool site that quickly makes weekly charts out of your Last.fm data. You can check back archives all the way back to when you first joined Last.fm and customize the chart layout, length, etc.
Sign up
List of users to add
cdschart
Glassmouth
LCTV
RihsUmbrella
chrysolite
Tom Vercetti
TattooedDreams
ctrclub
Renan90
Chevysus
666
Arcane_Sky
moonlight.