Yesterday, Google rolled out expanded sitelinks.
Sitelinks are the extra links to interior pages of a website, you sometimes see below the main listing.
They appear most of the time, when it is clear, or very likely, that you are looking for one exact specific result.
If you are searching for “Joe’s Plumbing”, Google expects you are looking for the website of a company near you with that name.
To speed things up they give you these extra links so you can go directly to directions, pricing, ordering page, or whatever look like the most important and relevant pages in the site.
Now they are showing as many as 12 such links, they are providing a short snippet of info on that link, not just the link, and they are showing them more often.
Here’s Google’s official announcement, with a short history of the subject: The Evolution of Sitelinks.