Update: Google may let users comment on, rearrange search results

Google is considering allowing users of its search engine to tinker with query results by re-ranking them and commenting on them.

The company has already run public tests on its search-results pages that contain up and down arrows next to listed links, as well as buttons that allow users to append comments to results.

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"At this point, I can't say what we expect from this feature; we're just curious to see how it will be used," wrote Ben Gomes, a Google Distinguished Engineer, in the company's official blog on Tuesday.

A screenshot of one of these test pages also shows "x" buttons next to results to apparently remove them from view, although this isn't addressed by Gomes.

Should Google decide to incorporate these as default features, the change would be a significant step by the company in giving people power to interact with its search-results pages.

There are a number of customization and personalization options that Google grants to users who open a Google account, such as keeping a log of their search and browsing activity via a service called Web History, as well as bookmarking and annotating site links with a service called Notebook.

However, in this test, the new functionalities apparently would be available to any user, not just those who are signed in to their Google accounts. The screenshot resembles a test described in a Google Labs Experimental Search page , although the experiment requires users to sign in to their Google accounts. It is not currently listed on the main Experimental Search page and is described as probably available for only a few weeks, so it is not clear whether it's still available for testing.

Google has often been criticized for having a search engine that depends too much on mathematical algorithms while giving little room for users to offer feedback and contribute to the process of rating, ranking and evaluating results. These knocks have become more and more common as the popularity of Web 2.0 services has grown, since they all champion the building of user communities.

As a reaction to the Google approach, a variety of search engine projects have emerged over the years that attempt to give people more participation, such as Jason Calacanis' Mahalo , Yahoo's Delicious social bookmarking service and Jimmy Wales' Wikia Search .

At Wikia Search, for example, anyone, whether registered with the site or not, can add, delete and rate search results, as well as edit the content of a search result URL by modifying its headline and description. In true wiki fashion, changes are reflected immediately and don't go through an approval process, counting on the community to police itself and establish, at least in theory, its collective wisdom.