The first update for Visual Studio 2013 came out a couple of days ago and is heavy on bug fixes but not much in the way of new functionality. You can download the latest update from the following link:

http://www.visualstudio.com/downloads/download-visual-studio-vs#d-visual-studio-2013-update-1

Here is a list if the new additions underlined:

http://support.microsoft.com/kb/2911573