Google Toolbar has a useful feature called AutoLink which detects the content from a page that follows some predefined patterns and adds links to pages that offer more information. AutoLink detects US addresses, UPS tracking numbers, International Standard Book Numbers (ISBN) and Vehicle Identification Numbers (VIN) and links to relevant pages from sites like Google Maps, Amazon or CarFax. Despite its name, AutoLink adds the links only after you click on the Google Toolbar button and also shows the links in a drop-down menu...