The preview for WebMatrix 3 was released a few weeks back. The below videos provide walkthroughs on new features in this preview.
Windows Azure integration
Remote site editing
Walkthrough: How to Edit a Remote Site with WebMatrix
Source Control with GIT
Walkthrough: How to use Git in WebMatrix
Video: Using Git with WebMatrix
Source Control with TFS
Walkthrough: How to use TFS in WebMatrix
Video: Using TFS with WebMatrix
You can go ahead and download the preview at http://www.microsoft.com/web/webmatrix/next/
Don’t forget to provide feedback at http://webmatrix.uservoice.com/
Till my next post.