If you want to do something similar with an iPhone, you should check Milestones, http://alandair.com/milestones. Keep and share geolocated notes, possibly with photo, via Twitter/Twitpic and email (KMZ for Google Earth). Backup as a Google Fusion Table, with photos sent to Picasaweb. (Disclaimer: Milestones is my fault. Working now on recovering from the Fusion Table backup, and adding social awareness.)