Here’s a review of the new revamped Google search engine code named “Caffeine” (developer’s preview version) – http://mashable.com/2009/08/10/google-caffeine/
There’s no doubt Google is responding to pressure from Bing.com, the new improved Microsoft search engine which now has new legs since the deal with Yahoo.
They are also responding to the news that both Twitter and Facebook are coming out with their own search engines.
You can be sure the revamp of Google, the new Bing, and the new engines from Twitter and FB are going to change the role of search engine optimization somewhat.

