I just finished the first version of my Google Maps mashup: Transactions Map.
This combines a Google map with a list and markings of some properties in which I have helped clients invest capital. I thought it was visually powerful to show a select list of properties, scattered across North America.
On the map, if you click on a marker, it zooms into the property location. If you click on the list of properties in the right column, it will move the map to that property location.
I plan to load in more properties, but am looking for easier ways to store and classify the property transactions.
Today, Google rolled out their new My Maps feature. The also enabled a new feature that allows you to pull in information from Google Earth.