[prpon]

Looking at the source, it seems to be built with jquery isotope plugin. I couldn't see any similar examples at isotope site. Any one else know more details on the implementation?

Also, the job growth numbers for each city look suspicious. Was there such a jump in growth rate in Jan '11?

[shashashasha]

If you look on Isotope's site, we're just using a StraightDown layout, not filtering anything, and animating the dots within each div individually.

Can't speak to the job growth numbers methodology as they come from SimplyHired.com

[prpon]

Thanks for the info. Any tools you use for animating the dots and displaying the stats? Or is it plain javascript?

[shashashasha]

The animations are done with JQuery's .animate method, and since the stats are all across different ranges we're using D3's .scale and .quantize methods to normalize our positions.

If you have more specific JS questions than that I can point you at @golike who wrote all the code for this :)