Google is running an interface test in which a triangle appears next to search results. Click it, and that result expands revealing more information from the site and a “Search this site” box. Now, this is one of many interface tests going on at any given time, like the infamous sidebar test that someone writes up once a day or so, so don’t get excited.
However, LiveSide, a blog that covers all things Windows Live, points out that Microsoft’s new search interface (at live.com) already has a feature that lets you search a site in the middle of search results. When you push the detail slider all the way to the right, a “Search within this site ” button appears, and clicking it reveals a search box in which you can run a site search.
Of course, if Microsoft truly wanted to match Google’s feature, it could add a fourth level of detail to the detail slider that revealed as much information about the returned website as Google’s triangles do.