As we all know that Microsoft and Google are vicious tech rivals, web search is one of the areas where they will work together now.
Google Search App in the Windows 7 is an option in which you will be able to get results for Web, images, news and more at a faster rate and suggestions will appear as you type. In near future, its gonna be Google Instant, in which you will be able to view results as you type the keywords in the search box.
Now, not only the Windows 7 phones will have an alternative option for search machine apart from Bing, Google is also adding the app to localize the search according to the geographical location using the GPS capabilities of the Windows 7 phone.
Google search App is free to download via Windows 7 Market place. It would be interesting to see how the big daddy of search machines GOOGLE gains popularity on a Windows 7 phone.