IE7 optimized for Google can be downloaded from here (no longer available). The Internet Explorer 7 offered by Google has exactly the same features and functionality as the original IE7 downloaded from Microsoft or built-in in Windows Vista, except for the changes mentioned above.
Previously, Google has actively advertised and promoted Firefox browser which has everything defaulted to Google, and even has referral program that pays Google AdSense publishers for every download and install of Mozilla Firefox or Google Pack where Firefox with Google Toolbar is part of the software package. For IE7, Google has paid search listing as sponsored link that listed on top of the search results whenever users search for IE7 or IE 7 related keywords.
Early in its availability, IE7 optimized for Google also drew criticism firestorm when its download splash page (no longer available) is remarkably similar in design, layout, text wording and even the sample customized IE7 browser image has blurred or grayed out Yahoo! Toolbar trace in it.
IE7 optimised for Yahoo! splash page
IE7 optimized for Google splash page
Google has since changed the page totally, however Google IE7 browser has gain free viral marketing publicity. So could it be a marketing strategy of Google to release its customized version of IE7?