In a statement to Game Informer, Blizzard said the following:
"Bashiok's response on Twitter was intended as a confirmation that we're actively exploring the possibility of developing a console version of Diablo III, as we've mentioned in the past. This is not a confirmation that Diablo III is coming to any console platform. Our focus right now is on finishing the PC/Mac version of Diablo III and making sure it's a worthwhile successor to the Diablo series."
Diablo III on Consoles Moving Forward - Update: Diablo III on Consoles Still Not Confirmed - PlayStation 3 News at IGN