VGMap is a library developed at Eyebeam that lets you overlay arbitrary data and graphics onto Google Maps with Flash. Since you can dump anything you want into a Flash movie, you're free to annotate Google Maps with anything you want, from audio clips to banner ads of businesses. As an example, they've overlayed the NYC subway onto a map of Manhattan.
...is a weblog about the liberal arts 2.0 edited by Jason Kottke since March 1998 (archives). You can read about me and kottke.org here. If you've got questions, concerns, or interesting links, send them along.