What the Quick Bar Affair Says About Twitter’s Future

A firestorm erupted this weekend over a new Twitter feature known as the “Quick Bar,” designed to show trending topics. The criticisms are a symptom of a larger problem for Twitter: it wants to be a business, and users still see it as a utility.

Will All That Money Make Twitter Too Serious?

After Twitter CEO Dick Costolo wrote on the company’s blog about its funding round from Kleiner Perkins — which values the company at $3.7 billion — the blog post was edited to take some of Costolo’s witticisms out. Is Twitter too rich to have fun?

Twitter: From Gawky Teen to Responsible Adult

Twitter co-founder Evan Williams’ decision to step down as CEO in favor of COO Dick Costolo and recent moves to try and crack down on uses of the word “tweet” are two signs the startup is trying to grow up and get serious about its business.

Breaking: Twitter Founder Steps Down, Costolo New CEO

Twitter founder Evan Williams announced today in a post on the company’s blog that he is stepping down from the CEO position at the rapidly growing social-networking startup, and that former chief operating officer Dick Costolo will take the CEO position, effective immediately.