Hi JulieHyry,
Yes we are working on new skins. We'll be releasing them soon, but I can't give you an ETA just yet. I can tell you that full-width responsiveness is possible with framework currently, though. The grid in bootstrap 3+ is percentage based, so you should be able to make things stretch full screen relatively easily. The first step would be to remove the <div class="container"> element on line 69 of the layout.Master, and it's corresponding </div> tag on line 85. The center, left, and right panes should then stretch full width.
The next thing you'll need to do is comment out lines 667 - 670 in the mojo-extends.less file and re-compile the less, or else find the output for those lines in your main.css file and remove it. This will make the content in the top and bottom panes expand to full-screen.
We're planning to release an update to framework with the new skin releases, which will include some extra utilities for using CSS Flexbox to grid out content. This will also help with full-width responsive design. If you are designing your corporate skin and would like to test these changes and give us some feedback, I can get a pre-release build to you, just let me know.
Let me know how this works out for you.