How Data Visualization is used in real life, and where to go after finishing the tutorial.
Bit.ly’s Chief Dat Scientist, Hilary Mason, speaks about understanding the world in real time with data science.
Hans Rosling has given many great TED talks about stunning ways to present data.
Even websites like Mint.com use visualization to help folks understand their spending.
Where to go from here
Try parsing and graphing different sets of data. You will need to adjust the parsing & graphing scripts to adjust for the layout and context of whatever data you choose. Some sources of data you may be interested in: