Geogad – Free Audio Travel Guides is a Siicon Valley start up whose product is mobile travel guides.  Each guide is  a walking tour about an hour in length presented using maps, images and audio.  There are currently 15 tours covering San Francisco, Vancouver BC, Savannah, GA and New Orleans.  Initially the tours were available in two formats, on the web at or as a zip file containing a one page PDF walking map and about 50 MP3 audio clips.  You load the MP3s … Continue reading