Yammer agrees to Microsoft's $1 billion acquisition offer

Is this the first not-small web software company that Microsoft has acquired?

I wonder if they're going to eventually convert all the Java and Scala to C# and F#

Remember Hotmail, for example?

Here's the full text of the article:

Business-software company Yammer Inc. has agreed to sell itself to Microsoft Corp. for more than $1 billion, according to a person familiar [with] the matter.

It is unclear when the acquisition will be completed and announced, this person said.

A Microsoft spokesman declined to comment. Representatives for San Francisco-based Yammer didn't immediately respond to requests for comment.

Yammer is often called Facebook for the workplace because it creates a private social network inside a company. The purchase of Yammer could add social-networking functions to Microsoft's popular Office suite of software. Microsoft has an existing product, called SharePoint, with some functions that overlap with Yammer.

Bloomberg News earlier reported Microsoft was in discussions to acquire Yammer.

They use a lot of Ruby too.

Skype (not exactly web I suppose), Farecast, Hotmail