Hi, thanks for letting us know about this project.
I read through the design document, and there's definitely a lot of good ideas in there. I particularly agree with the list of questions the new site is supposed to answer, especially with regards to new, perhaps non-tech-savy visitors.
I just mocked up a little live demo of what I could imagine the new homepage to look like with regards to the points discussed in the design document.
Please feel free to check it out over here: http://codepen.io/awesomephant/full/DxIBo
I'd really like to contribute to this project, and any feedback on my proposal is very appreciated. A summary of my specific design decisions and why I made them will follow shortly.