"Sometimes you want to see the results for multiple searches in Google Maps or you want to quickly switch to a recent query. Now it's possible: Google Maps displays at the bottom of the page a list of recent searches and each layer of search results can be enabled independently. Google Maps uses different colors for the markers so you can differentiate the results." - Evan Parker

Congrats to Neal and team for this launch! They've been working on it a while, it took a lot of refactoring of various pieces of client code that display results on the map to make them all conform to the same interface that allows them to be displayed on the map at once. - Evan Parker