Google has always displayed a link on the homepage that bypassed country redirects: "Google.com in English" or "Go to Google.com", depending on the language. The link sent users to google.com/ncr (ncr=no country redirect), the pure savor of Google that has all the new features and it's not partial towards the pages from a certain country.
Now the link to Google.com is also displayed under the search box so you can check the search results for the same inquiry at Google.com. It's an useful feature, but Google also changes a cookie value and users are no longer redirected to the country-specific domain. Maybe a clasp link similar to the link to iGoogle and the classic homepage would be more useful.