One night at Marcin's pad in Copenhagen, we started to talk about how our individual culture really was a product of what we had been exposed to.
Marcin was playing with Dean's Plask framework for a project for the Roskilde Festival, and somehow we got the idea to visualize our music libraries (iTunes at that time), and create a visualization of where the artists we where listening too came from (or where their album was recorded).
We immediately called some friends, and got a pile of iTunes library .xml files collected, wrote a quick parser to extract artist- and album-names, and sat up a Node.js project that would iterate the list - querying various webservices (last.fm, wikipedia) looking for location data.
As the morning aproached, we left it there - must find time to complete this one day.