Some big news from the space where social media meets PR.

Salesforce.com, the enterprise cloud computing company, announced today that it will buy social media monitoring platform Radian6 for about $276 million in cash and $50 million in stock and cash.

The deal is expected to close in early May.

What does this mean for Radian6 customers, which include more than half the Fortune 100, including AAA, Dell, GE, Kodak, Molson Coors, Pepsico, and UPS?

In a blog post this morning, Radian6 CEO Marcel LeBrun said:

“Our plan is that Radian6 will continue to operate as an independent company. Clients will continue to work with Radian6 as they do today. Product innovation and progress that you have come to expect from Radian6 will continue.

“Collaboration and community remain a priority for Radian6. We will continue to work to increase awareness of how social media is changing how businesses operate. Community engagement will continue to be a big part of how Radian6 learns and communicates with friends, partners and customers.”

This morning, Twitter was buzzing with news of the deal. Of course, Radian6, which monitors conversations on social media sites, already knew that.

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