This tutorial is intended for developers who are familiar with PHP/MySQL, and want to learn how to use Google Maps with a MySQL database. After completing this tutorial, you will have a Google Map based off a database of places. The map will differentiate between two types of places—restaurants and bars—by giving their markers distinguishing icons. An info window with name and address information will display above a marker when clicked.
In addition to that you can find a ton of great Google Map Mashups as the Google Maps Mania blog.
As always, feel free to send me any examples that you’ve done (or that you’ve found) in libraries!