Just wanted to post about my new app / webapp: Terra Painter. It turns your iPhone into a virtual paintbrush, and everyone can contribute. Using GeoLocation, it uploads your location (anonymously) and a color to a database, and then plots it on google maps. The only thing the app sends is your lat/lng and color, nothing more. If you're interested, you can find out a little more about it here: http://www.terrapainter.com. The app itself is still in approval land, where it has been for the past 2 weeks, but I just released the webapp version this morning, which you can visit here: http://iphone.terrapainter.com In order for the webapp to work, you must visit from your iPhone. Right now it only works on the iPhone and you must have an active data connection as it uploads as you move. The next release will have an offline mode for places that don't have a cellular signal, or if you are overseas. This will allow you to save your travels, and upload them when you want.