So I found this website just recently. Apparently it's been around a while, but it renders some pretty sick graphs based on your play history on your Last.fm account. It's completely free and easy to use. The website is:

http://lastgraph3.aeracode.org/


If you want to see what my play history looks like:
http://lastgraph.s3.amazonaws.com/graph_41623.pdf

This is tight.
I have some parts where it's like SUPER thick without a prominent band.
http://lastgraph.s3.amazonaws.com/graph_41626.pdf

yeah, this is pretty sweet

http://lastgraph.s3.amazonaws.com/graph_41629.pdf

This is pretty nifty, i wonder how the guy got it to work. now if only i had a Last.FM playlist

Pretty neat!