Foursquare certainly would be at the top of any M&A list for check-in services. There's been questions about how Foursquare, run by Dennis Crowley can generate revenue, but the company recently raised $41 million in financing, so investors must see something about the company's future. The optimism surrounding Yahoo! right now is extraordinarily high, and the market is reflecting that. Shares are up 31.3% year-to-date, and more than 70% since Mayer took over the top spot in Sunnyvale, Calif. She has certainly been acquisitive since taking over Yahoo! and reshaping the company in her vision, having bought Stamped, a mobile review site, Snip.it, an online content organization company, OnTheAir, in addition to Tumblr.
A check-in app would continue Mayer's radical transformation of Yahoo! into the world's "daily habit," as she has so often put it. With Tumblr, and the potential acquisitions of Hulu and perhaps a check-in app, Yahoo! is fast becoming the go-to place in Silicon Valley for high-profile acquisitions. Now, all Mayer has to do is deliver on her promises. -- Written by Chris Ciaccia in New York >Contact by Email. Follow @Chris_Ciaccia