Is Starcraft 2 readily available for electronic download?
You can also download it currently :
using ShackNews "The electronic release will certainly can be found in enhancement to the boxed retail version slated to strike shops."
wikipedia converts that write-up's fragment as : "The video game will certainly additionally be readily available for electronic download from Blizzard quickly after release, otherwise on the release day"
Blizzard currently markets every one of their titles Digital Download using their store : http://us.blizzard.com/store/ when sc2 is launched it'll likely be readily available there.
so : Yes, on release day? Possibly.
UPGRADE : from main Starcraft 2 Website http://beta-us.battle.net/sc2/en/
Digital duplicates take place sale 07/27/2010 10 :00 AM PDT