There are so many 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.
My favorite feature is that you can now link to a Gmail Labs experiment by adding /keywords to the URL: http://mail.google.com/mail/#settings/labs/apps search.
{ via Gmail Blog }