Well, after Microsoft was engaged, with or without its wish, in the IE vs. Firefox Browsers War, it seems that the Redmont guys just play hard.
Today Microsoft just launched its own improved MSN Search engine. Google, on the other hand, just annouced that they nearly doubled the web pages they have in their index to 8 billion (and here is the answer to all the webmasters wondering what happened with the intense Googlebot activity last week). Now, this is a war to follow up!:)
UPDATE: Search wars – which is the best?, an interesting BBC comparison of the major search engines on the market.