My friend Chris alerts us that his mates Kentaro and Tozaki (of Tokyo Picturesque fame) have just launched DuoSnap: photos sent from GPS-enabled mobile phone are mapped onto a satellite picture of Japan.
Most KDDI AU and the recent NTT DoCoMo FOMA 900i and 901i series mobile phones have a GPS chip embedded in them that insert GPS coordinates in the photos' EXIF headers that are then extracted and used by DuoSnap to map the picture where it belongs.
more links... on similar projects... here... and there... too.