This looks like it could be a useful tool for those interested in their site's performance in different parts of the world. A free extra for Firefox that enables you to replicate a Google search in different parts of the world.
I've only played with it so far - mainly because I don't do any international web marketing - but it certainly seems to be well regarded by professionals in the field.
Google Global Firefox Extension - FAQs, screenshots and demo video from the creators Redfly
Firefox add-ons download page, including reviews