Even if you think you understand what's being said in hip hop music, you still might not really understand what's being said. 'The Rap Map' helps educate by using Google Maps to plot out references and origins in rap lyrics.
A lot of the major cities are plotted (with New York having the most landmarks, natch) and there's a good deal of information listed (with more on the way). The Rap Map is a pretty good tool for any self-respecting hip hop head or anyone just curious to find out who's said what about their city. Quick, why is 560 State Street important? [The Rap Map via Kottke]