Friends and family have been sending me links to Beer Menus. It is a great mashup of beer and google maps technology. The only shame at this point is that it is limited to only New York City. But you have to start somewhere and for all the bars it's a great place to focus the idea, work out the bugs, then move to a larger scale. I suspect keeping the lists current as they scale will be the issue. There is a lot of data and updates necessary. In time I could see bars keeping a RSS list of beers that auto-updates their personal listing and while the technology exists I suspect it's still a few years from becoming common place. It's a site worth watching as a beer geek to see how it progresses, it certainly will be a handy tool in urban areas.