I can't recall if it was last Thursday night or Friday morning when I ran a search on Google and noticed some new features in the results. Turns out, they've brought back something they've tried before, this time calling it SearchWiki.
The premise is pretty simple. See something you like, but wanted to see higher, move it up. Don't like it? Get rid of it. (And when you do, it makes a little vanishing cloud appear, kind of like removing an app off your Mac Dock.) Want to leave a note about the link for yourself and others? Click the comments icon. (The way I understand it, the moving things up and / or deleting them only effects your personal results, not the results of others.) Ultimately it all is intended to help improve and personalize your search experience.
What I find most interesting is how not everyone is a fan of their testing these new features out. Well, if they don't test it, how can they get feedback on it? Innovation is one of Google's core principles. They ask employees to devote a good deal of time to it. It's what got them to where they are and what will keep them there.
Not only that, but the idea of "If it ain't broke, don't fix it," is past it's time, if it truly ever had a time. That's how Yahoo!, MSN, Lycos and all the others lost out to Google in the first place. If you're not constantly trying to make what you have better, you're going to eventually lose ground and share to a competitor who is. The minute you stop evolving and learning is the day you start becoming irrelevant.