Twitter and Wall Street react to Dick Costolo’s departure

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Dick Costolo - Twitter
Dick Costolo.
Photo: Kevin Moloney/Fortune Brainstorm TECH. Licensed under CC BY-ND 2.0

Twitter head Dick Costolo will step down as company CEO, effective July 1. Co-founder Jack Dorsey will replace him while the company finds new leadership.

This is pretty huge news for the microblogging site, but you almost wouldn’t know that from reading Twitter.

Obama tweeting from an iPhone isn’t all that it seems

Barry sending his first tweet from an iPhone.
Barry sending his first tweet from an iPhone.
Photo: White House

The Apple-watching world lost its shiz yesterday when Obama made his first tweet from his brand-new presidential Twitter account using an iPhone. But don’t get too excited, because the White House has revealed that the phone in question isn’t Obama’s regular handset after all.

Which prompts the question, “Who did it belong to?” Maybe Apple should commission JFK director Oliver Stone to shoot an advert/paranoid conspiracy thriller on the subject of the Obama iPhone.

Barack Obama writes his first tweet from an iPhone

Barry sending his first tweet from an iPhone.
President Obama sending his first tweet.
Photo: White House

  President Barack Obama is finally ready to enter the age of social media. After sitting behind the Resolute desk for six years, the president finally opened his own Twitter account today, but rather than using his hacker-proof BlackBerry to send his first message, POTUS turned to an Apple product.

Here’s his first tweet, sent from an iPhone:

China goes wild during Tim Cook’s week-long Apple Store tour

Tim Cook is looking to bring Apple to Iran
Tim Cook is looking to bring Apple to Iran
Photo: Apple

Tim Cook just finished a week-long tour of China, complete with stops at new Apple Stores across the country, as well as a visit to the elementary school at Communication University of China, and a meeting with China’s Vice Premier.

Cook created a Weibo account earlier this week to announce Apple’s new green initiatives in China, but the Apple CEO didn’t stop there. Rather than posting to Twitter, Cook stayed active on the Chinese microblogging all week, posting his interactions with customers and colleagues. In just five days, Tim has amassed over half a million Weibo followers (he’s got 1.3 million on Twitter) by keeping Chinese fans updated with seven posts during the trip.

Take a look at Tim’s awesome Weibo travelogue: