Have you ever found it just a little bit tricky to find what you were looking for on the Gmail Labs Settings page? Scrolling was ok when there were a handful of Labs, but now there are over 50 Labs features in Gmail that's difficult to find one of them. There's always Ctrl+F to the rescue, but you shouldn't have to use a browser feature for this.
To solve this problem, Gmail added a search box that performs some simple text matching and it's not another Labs feature, so anyone can use it. Start typing docs, chat, labels and you'll see a list of Labs experiments that match your keywords.
You can also link directly to the search results (e.g. http://mail.google.com/mail#settings/labs/video) if you'd like.