8 Months Ago, NuclearLaunchDetected from Nuclear Launch Detected says (in StarCraft II Q&A - Batch 48) StarCraft II will support widescreen but not multi-monitor. Widescreen is definitely becoming more of an industry standard, but multi-monitor support for StarCraft II may be too great of a tactical advantage over other players without more than one monitor.

11 Months Ago, Anderson Mccutcheon from StarCraft-2 (Feedburner) says (in Opinion: Q&A 48: Macro Complicates, No Day/Night in Multiplayer) StarCraft II will support widescreen but not multi-monitor. Widescreen is definitely becoming more of an industry standard, but multi-monitor support for StarCraft II may be too great of a tactical advantage over other players without more than one monitor.