Google has always displayed a search box especially for navigational queries like below the top search result that allows a user to type a new query and restrict the results to "that particular site only."
Ofcourse, you can use the "site: operator," for other site that don't trigger the search box.
Google has begun testing a similiar feature that shows "Search Within" command within its Instant search interface--now, when you perfrom certain searches such as [CNN], [Apple] or [Google]-- "one of the options that Google Instant now showing is "Search Within"."
Selecting the option, Google will let you type a new query and allows you to limit your search to the specific website.
It's somewhat similar to Chrome's "tab to search" feature.
Watch this Tecno-Net's video below, showing this feature in feature:
Also, Google is running a experiment that involves larger text for the URLs on its search results pages displayed under the title.
The new URLs still in green-color are a lot larger and harder to ignore as previously, Google preferred smaller text on the URLs. And, the "share" link for Google+ is also more visible now, although it's still displayed when you mouse over a search result.
Below is a screenshot, from Google OS who spotted this test:
Google is rolling integration of its Panda algorithm into the search ranking algorithm as early as this weekend along with the next Panda refresh "major."
Matt Cutts at the SMX West (SXSW) announced that the Panda refreshes will now be more real-time, as opposed to being manually pushed out currently.
Cutts called the upcoming Panda update "very significant."
Here is a partial transcript from the audio:
It seems the Panda update is lives, however, Google wouldn't confirm this time as it's already baked into the google search engine raking algorith,--a company spokesperson tweeted:
"Rather than having some huge change that happens on a given day. You are more likely in the future to see Panda deployed gradually as we rebuild the index. So you are less likely to see these large scale sorts of changes."
"don't expect us to tweet about or confirm current or future Panda updates because they'll be incorporated into our indexing process and thus be more gradual."