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Microsoft will debut a Facebook for the enterprise called TownSquare at the Enterprise 2.0 Conference in Boston today. Microsoft Office Labs launched the product to 100 Microsoft employees in January and about 8,000 have signed up since, Office Labs GM Chris Pratley told Computerworld, which described TownSquare as "strikingly similar to Facebook.com." Similar? TownSquare does all the tricks Facebook's news feed does, updating users with changes their contacts made to various networked documents. So why did Microsoft stop at ripoff and not go for a complete copy? You'd think for its $240 million, Microsoft could of just "pulled a Zuckerberg" on some of Facebook's code and called it a day.