Google have just announced +1, a new addition to Search that aims to "get you the most relevant results as quickly as possible." It seems all well and good, and the concept of using user recommendations to improve search results is something that really needs to be in Google Search, but it has one fundamental flaw.
How many times - when you're searching and come across something actually useful to your query - do you return to the list of search results? I only ever return to the listings page if I find the link unhelpful or irrelavent. Maybe Google should look at a system of negative feedback instead?
I'm not saying that this isn't a necessary system, far from it. I honestly believe that user recommendations are one of the best ways of conveying relevance. But I also think that Google should be putting more weight on social sharing; manually sharing a post is without a doubt the best way of stating "this is relevant to me in some way". I'm hoping that Google are doing a lot with tweets; parsing hashtags and keyword searching content to gain some kind of link context (and thus improve specific queries).
Now, if Google were to introduce a +1 into my entire web experience - through add-ons for the major browsers, or even a Google-backed proxy that injected the +1 button into the site I was viewing - I would be a lot happier and certainly click on it more. Until it's there, on the content with me, I just can't see myself using this.