Periodic Table of Heavy Metals
Woah, this is rather epic. The fine folks at Fine Chart Labs have created a new limited edition print that features a periodic table of heavy metal bands, and it features over 300 bands in a multitude of genres (everything from AC/DC to Assück). While some of the genre classifications are questionable, it's still an awesome feat. Here is the hi-res version of the poster, which you can buy for $20.