I suppose people are going to freak out about the privacy issues concerning the recent revelation that since iOS version 4.0 your device has been keeping a record of where it has been. Personally I just thought it was awesome to see the data using this great open source tool cooked up by the researchers who discovered the recorded data. This reminds me, I should spend more time in Vegas.
And I should go sailing more.
Update: Note that the granulaity of the visualization is artificially aggregated into a grid cluster (and weekly cluster) by the visualization tool. I altered the code to not collect all locations to the nearest grid point and this is what it looks like then: