Pretty cool, 2nd year running NYC has hosted NYC BigApps - a contest for developers to write applications on the new data provided by nyc datamine.
One of the winners this year (recently announced) was NYCPlanIt (and rather poor video here). The app is very simple (you wont find yourself using it), but nevertheless an interesting approach likely to encourage future development. I think what's important is it's use of totally free and updated data sets... which is a game changer.
Data sets used:
Art facilities
Historical signs
Museums
Historic houses
Events
Zoo
Ice skating
Nature centers
Playgrounds
(Side note, if you have never checked out data.gov its an interested initiative from the fed govt to open up data.)



