Language != Location

Dear Web Designers and Usability Guys,

More and more sites are available in multiple languages these days. And some even provide different information based on the location of the user, e.g. relevant news, local weather, or price information.
For the majority of Internet users, location implies language. However, it is not always the case! If you are only interested in language, ask the user which one does he or she prefer. If you are interested in location - ask for location. It is cool if you are able to detect my location automatically, but it drives me mad if I can't change it manually if needed. Suppose I want to look up the news for a different place? Or I'm planning to buy this device when I'm back home? Why can't I look up the bloody price I'll get there?
And remember: location doesn't imply language! For example, I currently stay in Germany, but I don't really speak the language, and it's really annoying when I cannot change it. A classic example is Amazon: when I'm in Germany, I'd like to search amazon.de and see the products they have here and the local prices in Euros. I can do that, but only in German. I cannot switch to English without switching to GB or USA.