This is ” bloomberg west.” microsoft has a new competitor as it checks into taking a stake in foursquare.

American express is also trying to invest in the mobile check-in company.

What makes foursquare such a hot target?

Who are some of the other players that could be considering an investment?

Keep reading…

Read also:

Who Needs Foursquare More: Google, Yahoo Or Microsoft? (Marketing Land)

Microsoft might invest in Foursquare. Maybe this means Bing Maps will suck a … (PandoDaily (blog))

Foursquare investment considered by Microsoft and American Express (SlashGear)

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