The revelation came during a panel discussion at the IAB Annual Leadership Meeting 2010. One of the panel members, Anamitra Banerji, is Twitter’s head of product management and monetization. In response to a question about timing, Banerji seemed to indicate that Twitter could begin a launch of some sort within the next month.
Obviously, it’s probably not a good idea to hold your breath given how long it has taken Twitter to monetize. And even if the company does roll out an ad service, it may be limited in scope and highly experimental.