It seems a terrible understatement to say Yahoo! Inc. (NASDAQ:YHOO) CEO Marissa Mayer has been busy over the past year.

In the late 90s, Yahoo! Inc. (NASDAQ:YHOO) seemed to dominate the cyberworld as the search engine of choice for masses of new web surfers.

Yahoo! Inc. (NASDAQ:YHOO) was in 66 hedge funds' portfolios at the end of March. YHOO has experienced a decrease in hedge fund interest recently.

Yahoo! Inc. (YHOO) The big news this week was Yahoo! Inc. (NASDAQ:YHOO)'s $1.1 billion acquisition of micro-blogging site Tumblr.

All the analysis I've seen on the deal focuses on what it means for users. Is Yahoo!! cool enough to keep them? Will they abandon Yahoo!

So another young tech genius cashes out as Yahoo acquires Tumblr for $1.1 billion. Will Yahoo CEO Marissa Mayer be able to turn it into a profitable venture?

When the news that Yahoo! Inc. (NASDAQ:YHOO) may acquire Tumblr started circulating last week, analysts were quick to draw comparisons between it and another recent billion-dollar social media acquisition - Facebook Inc (NASDAQ:FB)-Instagram.

"We promise not to screw it up," said Yahoo Inc. CEO Marrisa Meyer. Tumblr founder and CEO David Karp reassured users of the social media site that all will be fine with the acquisition.

Yahoo! Inc. (YHOO) Now that Yahoo! Inc. (NASDAQ:YHOO)'s efforts to buy a controlling stake in Dailymotion have come to an end, the rumor is that the company is looking to buy Hulu.

Internet issue Yahoo! Inc. (NASDAQ:YHOO) has erased early losses to trade 0.7% higher, with the stock last seen at $26.70.