The faction balancing and new features outlined last month for Starcraft 2 will be implemented this coming Tuesday, September 21, when Blizzard updates the successful strategy title to version 1.1. These new features include support for NVIDIA 3D Vision displays, left-handed hotkey options and new map editor functionality. The full list of features and balance changes can be read over on Battle.net.
The patch will go live during a maintenance period starting Tuesday morning at 5 a.m. until 11 a.m. PDT, at which time the game's online multiplayer modes will be temporarily offline. If you've got a score to settle with a distant rival, you probably shouldn't schedule your grudge match during that downtime - not that any of you are awake that early. As far as how the community is recieving the patch, it seems as though everyone is extremely happy with the majority of the updates. I myself as a protoss player am a bit worried but I will just have to adapt and overcome.