We have added the search button on the top right of the page. Click it and you will be able to do instant search, on both Forum as Docs. We're implementing this in more parts of the website, improving the developer experience :-)
P.S. If you don't see it, please refresh the page (caching)
Next to the re-design, we are also implementing a brand new Search functionality!
This should go online within the hour.
Looking good, only comment is that when the search box is open I would have liked that when I click it would automaticly open a new tab. Because then the search is kept open and if the post is not what I am looking for I still have my search results.