Google just announced that it is acquiring Motorola Mobility. The search and online advertising company is buying the company for approximately $12.5 billion (or $40 per share), in cash. The price represents a premium of 63 percent to the closing price of Motorola Mobility shares last Friday. Google had about $39 billion in cash at last count.

Here’s the other important part of the PR (the why, and what happens to Android now):

The acquisition of Motorola Mobility, a dedicated Android partner, will enable Google to supercharge the Android ecosystem and will enhance competition in mobile computing. Motorola Mobility will remain a licensee of Android and Android will remain open. Google will run Motorola Mobility as a separate business.

In a blog post, Google co-founder and CEO Larry Page writes that Google has acquired Motorola not only because of its strength in Android smartphones and devices, but also for being a “market leader in the home devices and video solutions business.”

It’s also a move to build up the company’s patent portfolio, he adds, as it will “enable us to better protect Android from anti-competitive threats from Microsoft, Apple and other companies”....