I was just browsing through gamespot and here is what I found about HOS:
"One inquiry may have led Canessa to tip Blizzard's hand about the release date of the first expansion to Stacraft II: Wings of Liberty, Heart of the Swarm. When discussing such future Battle.net features as trading replays, broadcasting replays, and upgrading profiles, he said they were "a main area of focus we're going to be seeing on the Starcraft [II] side over the next 18 months between now and Heart of the Swarm." (Emphasis added.)"
congrats on the 5000 post mark
anyway if the beta starts soon for Diablo III (like... January) i think a release for March would be quite possible. Let's see what Blizzard will say about that in Blizzcon.
Ya, i thought they said HotS would come out about 1 year after WoL. Its 1 major release a year, expansions not including SC2 this year D3 in 2011, with HotS and Cataclysm Not counting in that time line