Thanks Chad. I'm interested in some more informations about that, especially how does this relates to the Privacy policy.
Is the information stored anywhere? Is there any way to opt-out of this? Is there another service used for this project (I'm thinking Google Latitude, but there are others)?
From a privacy POV, it doesn't really affect anything. It isn't
currently being stored anywhere, and is information that could accessed by other means. Every site you visit, including Wikimedia sites, could determine this info without doing it via this method, it's just easier for us to pull this way.
This isn't being used by any third-party tools, and is only currently being used for donation banner information as far as I know. It is being used to show more relevant banners to your area. There isn't any way to explicitly opt-out, but you could block the domain, or block the javascript that is being used. That said, there isn't anything to gain by blocking this.
Respectfully,
Ryan Lane