Twitter CEO Dick Costolo says his company is now seeing almost 250 million tweets every day, up from 100 million at the beginning of 2011.

FORBES: Web 2.0: Twitter Seeing Nearly 250 Million Tweets/Day; Over 100 Million Users

Twitter continues to get serious about how to make money on its service and experiment with advertising, not a month after new chief executive Dick Costolo took the company reins.

FORBES: Connect

Twitter has ruffled a few feathers recently, so when CEO Dick Costolo took the stage at the Online News Association conference in San Francisco, he took the opportunity to put some minds at rest.

ENGADGET: Twitter CEO reveals plans for interactive tweets, content curation, reinforces belief in syndication