Last week, #musichackday was held in Amsterdam, and a lot of really interesting stuff came out of it. One of the absolutely best things is Songshirts.
Basically, it finds your top songs on last.fm, pairs them with a font that goes with the genre (or so I think – it certainly seems like it) and the site lets you buy it directly from Zazzle.
Here are mine:
/by and via Matthew Ogle with Floris Dekker and Tim Bormans.