When it comes to the evolution of online search, as one wag put it, “If you drop your pencil, you miss a week.”

It does seem that significant new developments in search crop up almost monthly – each one having the potential to up-end the tactics and techniques that harried companies attempt to put in place to keep up with the latest methods to target and influence customers. It’s simply not possible to bury your head in the sand, even if you wanted to.

Two of the newest developments in search include the introduction of a beta version of the new Blekko search engine with its built-in focus on SEO analytics — I’ll save that topic for a future blog post — along with a joint press conference held last week by Facebook and Microsoft where they announced new functionalities to the Bing search engine. More specifically, Bing will now be displaying search results based on the experiences and preferences of people’s Facebook friends.

What makes the Bing/Facebook development particularly intriguing is that it adds a dimension to search that is genuinely new and different. Up until now, every consumer had his or her “search engine of choice” based on any number of reasons or preferences. But generally speaking, that preference wouldn’t be based on the content of the search results. That’s because the ability for search engines to deliver truly unique search results has been very difficult because they’ve all been based on essentially the same search algorithms.

[To prove the point, run the same search term on Yahoo and Google, and you’ll likely see natural search results are pretty similar one to another. There might be a different mix of image and video results, but generally speaking, the results are based on the same “crawling” capabilities of search bots.]

The Bing/Facebook deal changes the paradigm in that new information heretofore residing behind Facebook’s wall will now be visible to selected searchers.

The implications of this are pretty interesting to contemplate. It’s one thing for people to read reviews or ratings written by total strangers about a restaurant or store on a site like Yelp. But now, if someone sees “likes,” ratings or comments from their Facebook friends, those will presumably carry more weight. With this new font of information, as time goes on the number of products, brands and services that people will be rating will surely rise.

The implications are potentially enormous. Brands like Zappos have grown in popularity, and in consumer loyalty, because of their “authenticity.” The new Bing/Facebook module will provide ways for smaller brands to engender similar fierce loyalty on a smaller scale … without having to make the same huge brand-building commitment.

Of course, there’s a flip side to this. A company’s product had better be good … or else all of those hoped-for positive ratings and reviews could turn out to be the exact opposite!