Google has a vested interest in just about everything. Last week, the Internet search giant announced that it has signed a definitive agreement to acquire Postini for $625 million.

Postini is global leader in on-demand communications security and compliance solutions serving more than 35,000 businesses and 10 million users worldwide.

"With this transaction, we're reinforcing our commitment to delivering compelling hosted applications to businesses of all sizes. With the addition of Postini, our apps are not just simple and appealing to users - they can also streamline the complex Information Security mandates within these organizations," said Eric Schmidt, Chairman of the Board and Chief Executive Officer of Google.

"The response to Google Apps has been tremendous, with more than 1,000 small businesses signing up for the service every day. At the same time, large businesses have been reluctant to move to hosted applications due to issues of security and corporate compliance. By adding Postini products to Google's technology, businesses no longer have to choose - employees get the intuitive products they want, and the company achieves the security and assurance it needs," said Dave Girouard, Vice President and General Manager, Google Enterprise.

Should we suspect that these acquisitions mean that Google will control 90% of the market by 2017? No idea by now. But Microsoft Live Search is gaining momentum. Let the race begin!