] One of the great things about Google maps is it has its
] roots in XML. To translate for the non-web developers out
] there, it basically means Google maps are user hackable.
] This how-to will show you how to make your own annotated
] Google map from your own GPS data. Plus, you'll be able
] to tie in images and video to create an interactive
] multimedia map. We'll walk you through the steps we
] took to generate an annotated map of a walk we took
] recently through our hometown, now that it's actually
] starting to get warm enough to want to walk about!

Engadget | HOW-TO: Make your own annotated multimedia Google map