According to a flyer from video game retailer GameStop, StarCraft 2 is coming out for PC and Mac on June 2. Blizzard Entertainment, creators of the real-time strategy sequel, have a long-time policy of putting out games "when they are ready," as opposed to some set schedule -- GameStop's release lists have not always been accurate in the past -- so this is far from confirmed. I'd wait to hear from Blizzard before you put on your waiting shoes. But it seems likely to me.
Another interesting piece of info from the flyer: PlayStation 3 game Uncharted 2 is listed as hitting the stores on October 2.
Check out the full list here.