Update: BusinessWeek posted the Twitter Visualization and thinks I'm one of 21 heroes of Data Visualization :-).

Started doing some Geovisualizations. First image shows the worlds cities with a population of more than 1000, data from geonames.org. Cities with more than 5 million inhabitants are labeled.

hi-res version

Second image visualizes conversations of about 1500 users from microblogging service Twitter. The arcs link positions of people who talk to each other.

hi-res version

Done with the wonderful processing.org during my time at MODUL University Vienna.

Let me know if you're interested in working with me.