Unranked play, clans, new observer UI coming to WoL

Patch 2.0 for Wings of Liberty is looking to introduce a bucketful of features to the game, most of which debuted on Heart of the Swarm beta servers.

Patch 2.0 is said to bring the following set of improvements:

An all-new user interface with new menu screens.
The launch of in-game Clans and Groups.
New Replay features, such as Watch with Others and Take Command.
A multitude of Editor improvements.
New matchmaking options: Training Mode, Vs. AI Mode, and Unranked Play.
All-new AI Options, including AI Communication.
Players Near You, so you can find other StarCraft II players on your local network.
New customizable Observer UI.

As the patch is looking to be massive, background download of the pre-patch data is currently available and Blizzard encourage SC2 players to leave the launcher running for long periods of time as it was reported earlier that said data will be approximately 6GB in size.

Links
Battle.net - Source