How can I remove geolocation info from a picture on an iPhone?

Since geolocation info is usually preserved when I share a photo from my iPhone, I was wondering what the simplest way is to remove this geolocation info from an existing picture.

To be clear: I don't want to take a new photo, and I don't want to disable the option that geotags my photos. I just want to take an existing photo, remove the location info (e.g. by duplicating it, while retaining the original size), and then send it to a friend.

There's an App called GeoZapper ($1-$2) (or a free, limited Lite version), which will remove geolocation info from pictures.

If you know of any other apps or alternative methods to remove this info, please post them.

There are various PC software packages that will strip the information. One that works on PC is described here:

From - http://www.facebook.com/note.php?note_id=435525301297:

The best way to remove geo tags from your images is by using tool called Geotag Security. As the name suggest, this tool secures your images from Geo Tags. This tool is very simple to use and with one simple click you can delete geo tags from all your images. You will see following window when you run this tool.