As we’ve been promised for over a year, Twitter’s self-serve ad product is still in the pipeline. In a profile of twitter’s Chief Revenue Officer Adam Bain, Fortune magazine notes that the company is expected to pull in $288 million in direct sales ad revenue this year. That’s a far cry from the $400 million business that self-serve ads are expected to bring in. That is, if Twitter ever gets around to launching it. [Source: Fortune, PandoDaily]