HBO has a Google Maps Web2.0 real-estate Mashup going on for the Sopranos. And they're advertising it in AdWords. You might see the ad over on the right. (Not that I'd encourage you to click it.)
Unfortunately, the implementation - in Flash, of course, is broken for me. Probably too many users or something. Still, you can go there and get the gist of it even if it's not working.
Update: MSFT must have gotten to them. It only works in IE. Ugh.
When a TV series does a mashup does that qualify as jumping the you-know-what?