While Blizzard rarely confirms dates this far in advance, its a more definitive date than "the next few years," the previously mentioned release window for Heart of the Swarm, Diablo III and the developer's still unannounced next-gen MMO.
Canessa told GDC Online attendees that those working on the Battle.net side would be working on new features, including "trading replays, broadcasting replays, and upgrading profiles," according to GameSpot's extended account.