This is in development, and we could use your help verifying browser compatibility, spotting bugs, etc.
Known issues include problems with indexing of some articles (the subheads and drop-down nav menus aren't quite right). Also, the "Systems" section is currently unpopulated.
Some things to try:
-Looking at the various section pages linked in the nav menu
-The "A/A" color theme switch icon to the right of the search field in the nav bar
-Clicking on a "More stories..." or "More features.." or tags link to go to the archives. There, you can multi-select content types and tags, as well as trying out the <echo>time machine</echo>.
-Paging through/around an article via the nav block at the page's end. Also check out the look of an article's last page.
-The improved search accessible via the field in the nav bar.
-Posting the comments. Let us know of any issues here.
FYI, we do have plans for a wider version of the page layout, including for forums, but it's not yet implemented.
Let me encourage you to step through the first few items of the list of things to try before pronouncing judgment on this stuff. The major changes here will inevitably require a period of adjustment for long-time readers, but once you see how it fits together, I think that helps. Thanks!