[ephimetheus]

This is already being done. Same as geo targeting dynamically inserted ads based on the IP of the downloading client.

[wrboyce]

They use the IP! That explains why I was getting Spanish ads for a few days after returning home.

[OptionOfT]

I lived in CA and got advertisements for Ralphs. I spent some time in Sedona and all of the sudden I got the same advertisements, same jingle etc but instead of Ralphs it was Fry's. That definitely threw me off.

[crtasm]

My podcast downloader is always on an IP from another country, I don't mind the ads nearly as much when I can't understand a word they're saying!