The friendly folks at Blizzard have been dropping hints in the Battle.net forums for a while now about the development of SC2. I figured I would collect them here for fellow fans to obsess over.
Thread name: Ask Preston
Thread subject: Don't ask Jeeves. Ask Preston. Go on. Ask me about anything.
Blizzard poster: DatH
Post contents: Is there a StarCraft 2 in the works?