Here is a Google Maps TV Map which takes the current BBC TV listings and displays locations where shows are taking place on a Google Map.
Here is a description from this blog entry:
Presenting the TVMap: mixing up the BBC's TV listings (and Bleb's feeds for other channels) with Google Maps, to produce a map that shows what locations will be on TV soon. Interested in all programs about Abu Dhabi? No problem, it'll email you about them. Want to know if there's anything about Canada on today? Sure, not a problem.
It works by parsing out all proper names from the descriptions of programs and running them against a subset of world GNIS data -- it won't pick up every reference, and right now a couple of things have to be cleaned by hand (for example, Chucklevision doesn't take place *in* Barry...),
but some quick filters should sort that out in the next couple of days.