Well, I'm calling it that anyway. Three new entrants into using Google Maps for finding beer:
BeerMapping.com's Brewery Map lets you find (go figure) breweries and brewpubs. Here's what my slice of the world looks like:
Crooked Beat Beer & Music Map gives you a way to search NY/NJ area for live music and beer selection. I like the “at least 1 good beer” criteria.
Finally, pintsearch.com lets you search pubs in London by location, tube, or postcode.
Thanks to Google Maps Mania for the links.