If you call 213-221-3802, you can create your own voicemarks. A voicemark is an audio "blurb" posted on a virtual free verbal message board ... for exchanging location-specific community information ... any place with any mobile phone! This is made possible by a site called Geograffiti. I have been playing with this site a bit and found it engaging. What I like is that you can create audio "geo tagged" projects with this resource.
The Stavros Escapade is a project sponsored by WOMWorld, and is meant to promote geotagging. Stavros will be using a Black N82 and will take one motif submitted by people from across the globe and try to move around Rome so that his movement on a map would match the motif. This is called Position Art and the major event is taking place as I write.