Killed tabs in favor of spaces; fixed about section to be more readable and use only two columns
fixed crazy HTML markup in news section
Put styles in a stylesheet file instead of in the head
Added padding between news list items
Put features in four columns
fixed sections so you can see the heading you jumped to underneath the top bar
Made icons and headers in the installation instructions section more consistent; edited OSX logo to be shorter and added a homebrew logo
Put ubuntu in the leftmost column of installation instructions
Reformatted the build instructions section to be less chaotic
Started reworking how-mosh-works section to reduce width of text blocks for readability
redid technical info thumbnail sections
made FAQ markup a bit more clean, made it and the contact section narrower