A friend of Sloopin sent us a link to this sweet New York Times interactive Census map and needless to say we had some fun. Above is a screen shot of the greater South Loop area. The data is based off of samples from 2005-2009. You can see Chinatown towards the bottom, Pilsen to the Left and the diversity especially south of Roosevelt.
If you click on this link I promise you will have some more fun. Zoom out and see the racial makeup of the broader city. Or take a look at HHI or family statistics. We played with this for at least an hour. Enjoy!
(Hat tip: Bizau!)