Last.fm Wave Graph
In a lovely bit of information visualization, someone has devised a colour wave graph to show trends in your music listening. On the X-axis is time, in my case ranging from 2006 to 2008. On the Y-axis are the artists themselves, with the thicker the artist wave, the more that artist was listened to at that time point. Colour is a measure of recency of listen - in the case shown below, artists that were listened to from the begininng are red, and artists that are new are at the green-blue range. Colours, and many other options, are totally customizable.
This is a section of my wave graph, with the artist labels removed. (Click the image to see the full thing.) It really is quite beautiful. I think I'll get it framed.
Download Last.fm Extra Stats

That's amazing! Will you really get it framed? With or without labels? I'm going to go find mine now.
Totally unrelated... http://www.merch-bot.com/index.php?main_page=product_info&cPath=67_134&products_id=1271
Wait... everything I say is usually unrelated.
Ok. I enjoy your visualization's colours. Where would the frame's final destination be? (bedroom, bathroom or rec room)
Ha, I was only half-serious about getting it framed. But it would look nice, wouldn't it?
(seen the librarian tattoos. Heck, I think I even wrote something about it here)
Opps. guess I'm not up on my breakablecrate.com. Forgive me, I feel guilty and shameful.