Crowdflow needs you!
Crowdflow wants to have your iPhone data, to generate pretty heatmaps!
Why am I telling you this? Because they are using my backup-data-extractor code! See their most recent blog entry.
The images they produce look very good, much better then the KML file in Google Earth!
Be sure to help them soon, because Apple is working on deleting most location-data with the next iPhone update. After that, probably the next update, they’ll encrypt the location data so it is much harder/impossible to read.